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656
comm_protocol_modbus.py
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656
comm_protocol_modbus.py
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#modbus协议处理
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import sys
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import string
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import json
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import serial
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import time
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import menu_utils as utils
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import string
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import struct
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import math
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import modbus_tk.defines as cst
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from modbus_tk import modbus_rtu, modbus_tcp, modbus
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from print_color import *
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from comm_protocol import class_protocol
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from comm_thread import class_comm_master_thread
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from threading import Thread, Lock
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from modbus_tk.exceptions import(
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ModbusError, ModbusFunctionNotSupportedError, DuplicatedKeyError, MissingKeyError, InvalidModbusBlockError,
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InvalidArgumentError, OverlapModbusBlockError, OutOfModbusBlockError, ModbusInvalidResponseError,
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ModbusInvalidRequestError
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)
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def json_load_message(message) :
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json_dict = {}
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if isinstance(message, bytes) :
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json_dict = json.loads(message.decode('utf-8'))
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elif isinstance(message, str) :
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json_dict = json.loads(message.encode('utf-8'))
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return json_dict
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#从通讯字符串中取出寄存器地址，位地址，个数
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# 以下为允许的Modbus通讯地址信息
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#"8000#2" 从8000地址开始，连续取两个寄存器
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#"8000#2#s" 从8000地址开始，连续取两个寄存器, #s 代表有符号数， 缺省为无符号数
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#"8000" 或 "8000#1" 8000地址， 1个寄存器
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#"8000.2#3" 取8000地址的第2位开始取 3个位的数据
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#"8000#2#f#>" 8000地址开始，连续取两个寄存器， #> 大端模式， #f 浮点数,
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#"8000#2#f" 或 "8000#2#f#<" 8000地址开始，连续取两个寄存器， #< 小端模式(缺省模式)， #f 浮点数, 单精度
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#"8000#4#f" 或 "8000#4#f#<" 8000地址开始，连续取4个寄存器， #< 小端模式(缺省模式)， #f 浮点数, 双精度
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#"100618" 位地址618, 超过100000就表示是位地址
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def get_modbus_comm_info(addr_string : string) : #tuple(int, int, int, bool, bool, bool)
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reg_addr = 0
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reg_bit = -1
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reg_count = 0
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is_sign = True if "#s" in addr_string else False
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is_float = True if "#f" in addr_string else False
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is_big_endian = True if "#>" in addr_string else False
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info_splits = addr_string.split("#") # 使用'#'作为分隔符
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if info_splits != None :
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reg_bit_str : string = info_splits[0]
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reg_bit_splits = reg_bit_str.split('.')
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if len(reg_bit_splits) == 2 :
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reg_addr = int(reg_bit_splits[0])
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reg_bit = int(reg_bit_splits[1])
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else :
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reg_addr = int(reg_bit_splits[0])
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reg_bit = -1
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if len(info_splits) >= 2:
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reg_count = int(info_splits[1])
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else :
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reg_count = 1
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return (reg_addr, reg_bit, reg_count, is_float, is_big_endian, is_sign)
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#modbus协议基类, 无法独立工作, 需要派生类实现对应函数
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class class_protocol_modbus(class_protocol) :
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#protocol_port_name = "COM1", "dev/tty1" 之类的设备
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def __init__(self, protocol_name) :
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class_protocol.__init__(self, protocol_name)
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self.mode : string = None #协议open时的mode字符串
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self.master : modbus.Master = None #modbus主机
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self.last_errcode = 0 #协议最后一次故障代码
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self.timeout = 1.0
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self.mutex = Lock()
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return
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def set_modbus_master(self, master : modbus.Master) :
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if self.master != None :
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self.master.close()
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self.master = master
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if self.master != None :
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self.master.set_timeout(self.timeout)
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#reg_value最大为64位数据, reg_count最大为4
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def modbus_value_to_list(self, reg_value, reg_count, is_big_endian = False) -> list :
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result = []
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if reg_count == 1 :
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result.append(reg_value & 0xFFFF)
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elif reg_count == 2:
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if is_big_endian :
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result.append((reg_value >> 16) & 0xFFFF)
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result.append((reg_value >> 0) & 0xFFFF)
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else :
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result.append((reg_value >> 0) & 0xFFFF)
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result.append((reg_value >> 16) & 0xFFFF)
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elif reg_count == 3:
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if is_big_endian :
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result.append((reg_value >> 32) & 0xFFFF)
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result.append((reg_value >> 16) & 0xFFFF)
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result.append((reg_value >> 0) & 0xFFFF)
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else :
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result.append((reg_value >> 0) & 0xFFFF)
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result.append((reg_value >> 16) & 0xFFFF)
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result.append((reg_value >> 32) & 0xFFFF)
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elif reg_count == 4:
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if is_big_endian :
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result.append((reg_value >> 48) & 0xFFFF)
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result.append((reg_value >> 32) & 0xFFFF)
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result.append((reg_value >> 16) & 0xFFFF)
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result.append((reg_value >> 0) & 0xFFFF)
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else :
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result.append((reg_value >> 0) & 0xFFFF)
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result.append((reg_value >> 16) & 0xFFFF)
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result.append((reg_value >> 32) & 0xFFFF)
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result.append((reg_value >> 48) & 0xFFFF)
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return result
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def modbus_list_to_value(self, read_regs : tuple, is_big_endian : bool = False) -> int:
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read_reg_cunt = len(read_regs)
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read_value = 0
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if read_reg_cunt == 4 :
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if is_big_endian :
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read_value = (read_regs[0] << 48) | (read_regs[1] << 32) | (read_regs[2] << 16) | (read_regs[3] << 0)
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else :
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read_value = (read_regs[0] << 0) | (read_regs[1] << 16) | (read_regs[2] << 32) | (read_regs[3] << 48)
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if read_reg_cunt == 3 :
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if is_big_endian :
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read_value = (read_regs[0] << 32) | (read_regs[1] << 16) | (read_regs[2] << 0)
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else :
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read_value = (read_regs[0] << 0) | (read_regs[1] << 16) | (read_regs[2] << 32)
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elif read_reg_cunt == 2 :
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if is_big_endian :
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read_value = (read_regs[0] << 16) | (read_regs[1] << 0)
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else :
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read_value = (read_regs[0] << 0) | (read_regs[1] << 16)
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elif read_reg_cunt == 1 :
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read_value = read_regs[0]
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return read_value
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def modbus_read_regs(self, device_addr, reg_addr, reg_count) -> tuple:
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result_tuple = []
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try:
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self.mutex.acquire()
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if self.master is None:
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raise Exception("Call set_modbus_master() first to init protocol master")
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read_reg_count = reg_count
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is_bit_addr = reg_addr >= 100000
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func_code = cst.READ_COILS if is_bit_addr else cst.READ_HOLDING_REGISTERS
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result_tuple = self.master.execute(slave=device_addr,
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function_code=func_code,
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starting_address=reg_addr % 100000,
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quantity_of_x=read_reg_count)
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except ModbusError as e:
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self.last_errcode = e.get_exception_code()
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err_msg = f"Modbus 读寄存器错误: {str(e)}, modbus 读寄存器(addr={device_addr}, reg={reg_addr}, count={reg_count})"
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print_error_msg(err_msg)
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raise
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except Exception as e:
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err_msg = f"其他错误: {str(e)}"
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print_error_msg(err_msg)
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raise
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finally:
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self.mutex.release()
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return result_tuple
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#reg_addr >= 100000 时为写 位地址, 否则写保持寄存器
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#values 传入整数或浮点数时， 表示写单个寄存器， 或 强制单个位,
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#强制单个位时，modbus-tk会转化成0xFF00, 0x0000, 要是其他值时，需要修改modbus-tk底层库
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def modbus_write_regs(self, device_addr, reg_addr, reg_count, values) -> bool :
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try :
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success = False
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self.mutex.acquire()
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if self.master == None :
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raise Exception("Call set_modbus_master() first to init protocol master")
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if isinstance(values, float) :
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reg_value = (int)(round(values))
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values = [reg_value]
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elif isinstance(values, int) :
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reg_value = (int)(values)
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values = [reg_value]
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if len(values) != reg_count or reg_count == 0:
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raise Exception("error, value size %d not match to reg_count"%(len(values)))
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is_bit_addr = True if reg_addr >= 100000 else False
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if len(values) >= 2 :
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func_code = cst.WRITE_MULTIPLE_COILS if is_bit_addr else cst.WRITE_MULTIPLE_REGISTERS
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self.master.execute(slave = device_addr,
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function_code = func_code,
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starting_address = reg_addr % 100000,
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quantity_of_x = len(values),
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output_value= values)
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else :
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func_code = cst.WRITE_SINGLE_COIL if is_bit_addr else cst.WRITE_SINGLE_REGISTER
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if func_code == cst.WRITE_SINGLE_COIL :
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write_value= values[0] & 0xFFFF
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else :
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write_value = values[0]
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self.master.execute(slave = device_addr,
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function_code = func_code,
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starting_address = reg_addr % 100000,
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quantity_of_x = len(values),
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output_value= write_value)
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success = True
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except ModbusError as e:
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self.last_errcode = e.get_exception_code()
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print_error_msg(f"modbus写寄存器错误: {str(e)}, modbus写寄存器(addr={device_addr}, reg={reg_addr}, count={reg_count})")
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success = False
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except Exception as e:
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success = False
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print_error_msg(f"其他错误: {str(e)}")
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finally:
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self.mutex.release()
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return success
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def modbus_read_float(self, device_addr, comm_str :string, scale = 1.0, offset = 0.0) -> float:
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fvalue = math.nan
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try :
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reg_addr, reg_bit, reg_count, is_float, is_big_endian, is_sign = get_modbus_comm_info(comm_str)
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if self.master == None :
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raise Exception("Call set_modbus_master() first to init protocol master")
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read_reg_count = reg_count
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if reg_bit >= 0 :
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read_reg_count = 1 + (int)((reg_bit + reg_count - 1) / 16)
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result = self.modbus_read_regs(device_addr, reg_addr, read_reg_count)
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if read_reg_count == 4 :
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if is_big_endian :
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read_value = (result[0] << 48) | (result[1] << 32) | (result[2] << 16) | (result[3] << 0)
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else :
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read_value = (result[0] << 0) | (result[1] << 16) | (result[2] << 32) | (result[3] << 48)
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if is_sign :
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read_value = utils.value_u64_to_s64(read_value)
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elif read_reg_count == 3 :
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if is_big_endian :
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read_value = (result[0] << 32) | (result[1] << 16) | (result[2] << 0)
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else :
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read_value = (result[0] << 0) | (result[1] << 16) | (result[2] << 32)
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elif read_reg_count == 2 :
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if is_big_endian :
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read_value = (result[0] << 16) | (result[1] << 0)
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else :
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read_value = (result[0] << 0) | (result[1] << 16)
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if is_sign :
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read_value = utils.value_u32_to_s32(read_value)
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elif read_reg_count == 1 :
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read_value = result[0]
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if is_sign :
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read_value = utils.value_u16_to_s16(read_value)
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else :
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raise Exception("目前只支持读取(1,2,3,4)个寄存器个数")
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if reg_bit >= 0 :
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read_value = (read_value >> reg_bit) & (0xFFFFFFFF >> (32 - reg_count))
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if is_float :
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fvalue = math.nan
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if read_reg_count == 2:
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bytes = struct.pack('BBBB', read_value & 0xFF, (read_value >> 8) & 0xFF, (read_value >> 16) & 0xFF, (read_value >> 24) & 0xFF)
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fvalue = struct.unpack("<f", bytes)
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elif read_reg_count == 4:
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low_part = read_value & 0xFFFFFFFF
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low_bytes = struct.pack('BBBB', low_part & 0xFF, (low_part >> 8) & 0xFF, (low_part >> 16) & 0xFF, (low_part >> 24) & 0xFF)
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high_part = (read_value >> 32) & 0xFFFFFFFF
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high_bytes = struct.pack('BBBB', high_part & 0xFF, (high_part >> 8) & 0xFF, (high_part >> 16) & 0xFF, (high_part >> 24) & 0xFF)
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bytes = low_bytes + high_bytes
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fvalue = struct.unpack("<d", bytes)
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else :
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fvalue = float(read_value)
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if fvalue != math.nan :
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fvalue = fvalue * scale + offset
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except Exception as e:
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fvalue = math.nan #无效浮点数
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print_error_msg(f"modbus读浮点数{str(e)} 读保持寄存器(addr={device_addr}, reg={reg_addr}, count={read_reg_count})")
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finally:
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return fvalue
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def modbus_read_float_arr(self, device_addr, comm_str :string, count) : # -> tuple(float)
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fvalue = math.nan
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total_reg_count = 0
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try :
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reg_addr, reg_bit, reg_count, is_float, is_big_endian, is_sign = get_modbus_comm_info(comm_str)
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if self.master == None :
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raise Exception("Call set_modbus_master() first to init protocol master")
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float_result_arr = []
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read_reg_count = reg_count
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if reg_bit >= 0 :
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raise Exception("multi read for reg.bit is not support")
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#读连续寄存器数据, 再添加到浮点数 数组列表
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total_reg_count = read_reg_count * count
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result = self.modbus_read_regs(device_addr, reg_addr, total_reg_count)
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for i in range(count) :
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if read_reg_count == 4 :
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if is_big_endian :
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read_value = (result[0] << 48) | (result[1] << 32) | (result[2] << 16) | (result[3] << 0)
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else :
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read_value = (result[0] << 0) | (result[1] << 16) | (result[2] << 32) | (result[3] << 48)
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if is_sign :
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read_value = utils.value_u64_to_s64(read_value)
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elif read_reg_count == 3 :
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if is_big_endian :
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read_value = (result[0] << 32) | (result[1] << 16) | (result[2] << 0)
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else :
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read_value = (result[0] << 0) | (result[1] << 16) | (result[2] << 32)
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elif read_reg_count == 2 :
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if is_big_endian :
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read_value = (result[0] << 16) | (result[1] << 0)
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else :
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read_value = (result[0] << 0) | (result[1] << 16)
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if is_sign :
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read_value = utils.value_u32_to_s32(read_value)
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elif read_reg_count == 1 :
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read_value = result[0]
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if is_sign :
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read_value = utils.value_u16_to_s16(read_value)
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else :
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raise Exception("目前只支持读取(1,2,3,4)个寄存器个数")
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if is_float :
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fvalue = math.nan
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if read_reg_count == 2:
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bytes = struct.pack('BBBB', read_value & 0xFF, (read_value >> 8) & 0xFF, (read_value >> 16) & 0xFF, (read_value >> 24) & 0xFF)
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fvalue = struct.unpack("<f", bytes)
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elif read_reg_count == 4:
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low_part = read_value & 0xFFFFFFFF
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low_bytes = struct.pack('BBBB', low_part & 0xFF, (low_part >> 8) & 0xFF, (low_part >> 16) & 0xFF, (low_part >> 24) & 0xFF)
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high_part = (read_value >> 32) & 0xFFFFFFFF
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high_bytes = struct.pack('BBBB', high_part & 0xFF, (high_part >> 8) & 0xFF, (high_part >> 16) & 0xFF, (high_part >> 24) & 0xFF)
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bytes = low_bytes + high_bytes
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fvalue = struct.unpack("<d", bytes)
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else :
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fvalue = float(read_value)
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float_result_arr.append(fvalue)
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except Exception as e:
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float_result_arr = []
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print_error_msg(f"modbus读浮点数数组{str(e)},读保持寄存器(addr={device_addr}, reg={reg_addr}, count={total_reg_count})")
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finally:
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return float_result_arr
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def modbus_write_float(self, device_addr, comm_str, fvalue, scale = 1.0, offset = 0.0) -> bool:
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success = False
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write_value = 0
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is_writing = False
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is_reading = False
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try :
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reg_addr, reg_bit, reg_count, is_float, is_big_endian, is_sign = get_modbus_comm_info(comm_str)
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if self.master == None :
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raise Exception("Call set_modbus_master() first to init protocol master")
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fvalue_origin = round((fvalue - offset) / scale, 0)
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write_reg_count = reg_count
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if reg_bit >= 0 :
|
||||
write_reg_count = 1 + (int)((reg_bit + reg_count - 1) / 16)
|
||||
|
||||
if write_reg_count > 4 : #寄存器个数大于4个, 目前不支持
|
||||
raise Exception("write_reg_count is more than 4")
|
||||
|
||||
write_reg_values = [] #定义空列表
|
||||
|
||||
if reg_addr >= 100000 and reg_addr < 200000 : #位数据
|
||||
if fvalue > 0 :
|
||||
write_reg_values.append(1)
|
||||
else :
|
||||
write_reg_values.append(0)
|
||||
elif reg_bit >= 0 :
|
||||
if write_reg_count > 2 :
|
||||
raise Exception("register count is > 2")
|
||||
is_reading = True
|
||||
read_regs = self.modbus_read_regs(device_addr, reg_addr, write_reg_count)
|
||||
is_reading = False
|
||||
|
||||
origin_read_value = self.modbus_list_to_value(read_regs, is_big_endian)
|
||||
|
||||
write_value = (int)(fvalue_origin)
|
||||
bit_mask = (0xFFFFFFFF >> (32 - reg_count))
|
||||
set_mask = write_value & bit_mask
|
||||
|
||||
modify_value = origin_read_value
|
||||
modify_value = modify_value & ~(bit_mask << reg_bit)
|
||||
modify_value = modify_value | (set_mask << reg_bit)
|
||||
|
||||
write_reg_values = self.modbus_value_to_list(modify_value, write_reg_count, is_big_endian)
|
||||
elif is_float :
|
||||
if is_big_endian :
|
||||
format_pack = ">d" if write_reg_count == 4 else ">f"
|
||||
else :
|
||||
format_pack = "<d" if write_reg_count == 4 else "<f"
|
||||
format_unpack = "HHHH" if write_reg_count == 4 else "HH"
|
||||
|
||||
bytes = struct.pack(format_pack, fvalue_origin)
|
||||
write_reg_values = struct.unpack(format_unpack, bytes)
|
||||
else :
|
||||
modify_value = round(fvalue_origin)
|
||||
write_reg_values = self.modbus_value_to_list(modify_value, write_reg_count, is_big_endian)
|
||||
|
||||
is_writing = True #以下真正开始写寄存器
|
||||
self.modbus_write_regs(device_addr, reg_addr, write_reg_count, write_reg_values)
|
||||
is_writing = False
|
||||
success = True
|
||||
except Exception as e:
|
||||
success = False
|
||||
if is_reading : #正在读时发送异常
|
||||
print_error_msg(f"正在读浮点数时异常{str(e)}, 读保持寄存器(addr={device_addr}, reg={reg_addr}, count={write_reg_count})")
|
||||
elif is_writing : #正在写时发送异常
|
||||
print_error_msg(f"正在写浮点数时异常{str(e)}, 写保持寄存器(addr={device_addr}, reg={reg_addr}, count={write_reg_count})")
|
||||
else :
|
||||
print_error_msg(f"其他错误: {str(e)}")
|
||||
finally:
|
||||
return success
|
||||
|
||||
def modbus_write_float_arr(self, device_addr, comm_str, fvalue_arr) -> bool:
|
||||
success = False
|
||||
is_writing = False
|
||||
is_read = False
|
||||
|
||||
try :
|
||||
reg_addr, reg_bit, reg_count, is_float, is_big_endian, is_sign = get_modbus_comm_info(comm_str)
|
||||
if self.master == None :
|
||||
raise Exception("Call set_modbus_master() first to init protocol master")
|
||||
|
||||
write_reg_values = []
|
||||
write_reg_count = reg_count
|
||||
|
||||
if reg_bit >= 0 :
|
||||
raise Exception("multi write for reg.bit is not support")
|
||||
|
||||
if write_reg_count > 4 : #单次写入寄存器个数大于4个, 目前不支持
|
||||
raise Exception("write_reg_count is more than 4")
|
||||
|
||||
for fvalue_origin in fvalue_arr:
|
||||
if reg_addr >= 100000 and reg_addr < 200000 : #位数据
|
||||
if fvalue_origin > 0 :
|
||||
write_reg_values.append(1)
|
||||
else :
|
||||
write_reg_values.append(0)
|
||||
elif is_float :
|
||||
if is_big_endian :
|
||||
format_pack = ">d" if write_reg_count == 4 else ">f"
|
||||
else :
|
||||
format_pack = "<d" if write_reg_count == 4 else "<f"
|
||||
format_unpack = "HHHH" if write_reg_count == 4 else "HH"
|
||||
|
||||
bytes = struct.pack(format_pack, fvalue_origin)
|
||||
write_reg_values += struct.unpack(format_unpack, bytes)
|
||||
else :
|
||||
modify_value = round(fvalue_origin)
|
||||
write_reg_values += self.modbus_value_to_list(modify_value, write_reg_count, is_big_endian)
|
||||
|
||||
is_writing = True #以下真正开始写寄存器
|
||||
self.modbus_write_regs(device_addr, reg_addr, len(write_reg_values), write_reg_values)
|
||||
is_writing = False
|
||||
success = True
|
||||
except Exception as e:
|
||||
success = False
|
||||
if is_read : #正在读时发送异常
|
||||
print_error_msg(f"正在读浮点数时异常{str(e)}, 读保持寄存器(addr={device_addr}, reg={reg_addr}, count={write_reg_count})")
|
||||
elif is_writing : #正在写时发送异常
|
||||
print_error_msg(f"正在写浮点数时异常{str(e)}, 写保持寄存器(addr={device_addr}, reg={reg_addr}, count={write_reg_count})")
|
||||
else :
|
||||
print_error_msg(f"其他错误: {str(e)}")
|
||||
finally:
|
||||
return success
|
||||
|
||||
#@override
|
||||
def set_timeout(self, timeout = 5.0) :
|
||||
self.timeout = timeout
|
||||
if self.master != None :
|
||||
self.master.set_timeout(self.timeout)
|
||||
|
||||
def get_timeout(self) :
|
||||
return self.timeout
|
||||
|
||||
#@override 返回 math.nan 表示读取失败, 否则读取成功
|
||||
def read_float(self, device_addr, comm_str, scale = 1.0, offset = 0.0) -> float:
|
||||
return self.modbus_read_float(device_addr, comm_str, scale, offset)
|
||||
|
||||
#@override 返回 False 表示读取失败, 否则读取成功
|
||||
def write_float(self, device_addr, comm_str, fvalue, scale = 1.0, offset = 0.0) -> bool:
|
||||
return self.modbus_write_float(device_addr, comm_str, fvalue, scale, offset)
|
||||
|
||||
#@override
|
||||
#读取comm_str地址开始的连续地址count个数， 地址连续
|
||||
#返回 math.nan 表示读取失败, 否则读取成功
|
||||
def read_float_arr(self, device_addr : int, comm_str : string, count : int) :
|
||||
return self.modbus_read_float_arr(device_addr, comm_str, count)
|
||||
|
||||
#@override
|
||||
#写入comm_str地址开始的连续地址 写入总个数由 len(fvalue_arr)决定
|
||||
#返回 False 表示读取失败, 否则读取成功
|
||||
def write_float_arr(self, device_addr : int, comm_str : string, fvalue_arr : list) -> bool:
|
||||
return self.modbus_write_float_arr(device_addr, comm_str, fvalue_arr)
|
||||
|
||||
|
||||
#串口Modbus_rtu主机类
|
||||
class class_protocol_modbus_rtu(class_protocol_modbus) :
|
||||
def __init__(self, protocol_name = "modbus_rtu") :
|
||||
class_protocol_modbus.__init__(self, protocol_name)
|
||||
self.comm_parity = serial.PARITY_NONE
|
||||
self.comm_bytesize = serial.EIGHTBITS
|
||||
self.comm_stopbits = serial.STOPBITS_ONE
|
||||
self.is_open = False
|
||||
self.comm_uart = None
|
||||
self.rtu_master : modbus_rtu.RtuMaster = None
|
||||
return
|
||||
|
||||
#@override
|
||||
#parity('N', 'E', 'O', 'M', 'S') 选其一, 含义分别代表 ("无校验", "偶校验", "奇校验", "校验1", "校验0"), 缺省为无校验
|
||||
#stop(1, 1.5, 2)选其一, 含义分别代表 ("1个停止位", "1.5个停止位", "2个停止位"), 缺省为1个停止位
|
||||
#bit(5, 6, 7, 8)选其一, 含义分别代表 ("5位数据", "6位数据", "7位数据"，"8位数据"), 缺省为8位数据
|
||||
#baud(50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, 115200)选其一, 缺省为9600位数据
|
||||
#mode 需要是一个json字符串, exam: "{"name" : 'COM1', "baud" : 115200, "parity" :'E', "stop" : 1}" 代表COM1, 115200波特率, 偶校验, 1停止位
|
||||
def open(self, mode : string) :
|
||||
try :
|
||||
class_protocol_modbus.mode = mode
|
||||
mode_dict = json_load_message(mode)
|
||||
|
||||
print_inform_msg(f"打开: 协议名称:{self.protocol_name} ,工作端口:{self.mode}")
|
||||
except Exception as e:
|
||||
print_error_msg(f"错误modbus rtu信息:{str(e)}")
|
||||
mode_dict = None
|
||||
|
||||
if mode_dict :
|
||||
self.comm_port_name = utils.dict_or_object_get_attr(mode_dict, "name", "COM1")
|
||||
self.comm_parity = utils.dict_or_object_get_attr(mode_dict, "parity", serial.PARITY_NONE)
|
||||
self.comm_baud = utils.dict_or_object_get_attr(mode_dict, "baud", 9600)
|
||||
self.comm_stopbits = utils.dict_or_object_get_attr(mode_dict, "stop", serial.STOPBITS_ONE)
|
||||
self.comm_bytesize = utils.dict_or_object_get_attr(mode_dict, "bit", serial.EIGHTBITS)
|
||||
|
||||
try :
|
||||
self.comm_uart = serial.Serial(port= self.comm_port_name,
|
||||
baudrate= self.comm_baud,
|
||||
bytesize= self.comm_bytesize,
|
||||
parity=self.comm_parity,
|
||||
stopbits=self.comm_stopbits)
|
||||
|
||||
self.rtu_master = modbus_rtu.RtuMaster(self.comm_uart)
|
||||
self.set_modbus_master(self.rtu_master)
|
||||
self.set_timeout(self.timeout)
|
||||
self.is_open = True
|
||||
except Exception as e:
|
||||
print_error_msg(f"错误modbus rtu信息:{str(e)}")
|
||||
self.comm_uart = None
|
||||
self.is_open = False
|
||||
|
||||
#@override 关闭到modbus rtu 对应的串口
|
||||
def close(self) :
|
||||
if self.is_open :
|
||||
try :
|
||||
print_inform_msg(f"关闭 : 协议名称:{self.protocol_name} ,工作端口:{self.mode}")
|
||||
if self.rtu_master :
|
||||
self.rtu_master.close()
|
||||
if self.comm_uart :
|
||||
self.comm_uart.close()
|
||||
except Exception as e:
|
||||
print_error_msg(f"错误关闭modbus rtu信息:{str(e)}")
|
||||
pass
|
||||
finally :
|
||||
self.rtu_master = None
|
||||
self.comm_uart = None
|
||||
self.is_open = False
|
||||
|
||||
#以太网Modbus_tcp主机类
|
||||
class class_protocol_modbus_tcp(class_protocol_modbus) :
|
||||
def __init__(self, protocol_name = "modbus_tcp") :
|
||||
class_protocol_modbus.__init__(self, protocol_name)
|
||||
self.ip_str = "127.0.0.1"
|
||||
self.port = 502
|
||||
self.tcp_master : modbus_tcp.TcpMaster = None
|
||||
|
||||
return
|
||||
|
||||
#ip: 服务器ip地址, 缺省"127.0.0.1"
|
||||
#port: 服务器端口, 缺省502
|
||||
#timeout: 超时时间, 缺省 5.0S
|
||||
#mode 需要是一个json字符串, exam: '{"ip" : '192.168.1.201', "port" : 502, "timeout": 5.0}' 代表192.168.1.201, 502端口, 通讯超时 5.0S
|
||||
def open(self, mode: str):
|
||||
try:
|
||||
self.mode = mode
|
||||
print_inform_msg(f"打开 Modbus TCP: 协议名称:{self.protocol_name} ,工作端口:{self.mode}")
|
||||
mode_dict = json_load_message(mode)
|
||||
except json.decoder.JSONDecodeError as e:
|
||||
print_error_msg(f"解析模式失败: {str(e)}")
|
||||
mode_dict = None
|
||||
except Exception as e:
|
||||
print_error_msg(f"错误打开 Modbus TCP 信息: {str(e)}")
|
||||
mode_dict = None
|
||||
|
||||
if mode_dict:
|
||||
self.ip_str = utils.dict_or_object_get_attr(mode_dict, "ip", "127.0.0.1")
|
||||
self.port = utils.dict_or_object_get_attr(mode_dict, "port", 502)
|
||||
if "timeout" in mode_dict:
|
||||
self.timeout = mode_dict["timeout"]
|
||||
|
||||
try:
|
||||
self.tcp_master = modbus_tcp.TcpMaster(host=self.ip_str, port=self.port, timeout_in_sec=self.timeout)
|
||||
self.set_modbus_master(self.tcp_master)
|
||||
self.tcp_master.open()
|
||||
self.is_open = True
|
||||
except Exception as e:
|
||||
print_error_msg(f"打开 Modbus TCP 失败: {str(e)} IP地址:{self.ip_str} ,端口号:{self.port}")
|
||||
self.is_open = False
|
||||
|
||||
|
||||
#关闭到modbus tcp服务器的连接
|
||||
def close(self):
|
||||
if self.is_open or self.tcp_master is not None:
|
||||
try:
|
||||
if self.tcp_master:
|
||||
print_inform_msg(f"关闭 Modbus TCP: 协议名称:{self.protocol_name} ,工作端口:{self.mode}")
|
||||
self.tcp_master.close()
|
||||
except Exception as e:
|
||||
print_error_msg(f"错误关闭 Modbus TCP 信息: {str(e)}")
|
||||
pass
|
||||
finally:
|
||||
self.tcp_master = None
|
||||
self.is_open = False
|
||||
print_inform_msg("已断开与 Modbus TCP 服务器的连接")
|
||||
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
protocol_modbus_rtu = class_protocol_modbus_rtu("modbus_rtu")
|
||||
protocol_modbus_rtu.open('{"name" : "COM2", "baud":115200, "parity" :"E", "stop" : 1}')
|
||||
protocol_modbus_rtu.close()
|
||||
|
||||
protocol_modbus_tcp : class_protocol_modbus_tcp = class_protocol_modbus_tcp("modbus_tcp")
|
||||
protocol_modbus_tcp.open('{"ip" : "127.0.0.1", "port" : 502, "timeout" : 4.0}')
|
||||
protocol_modbus_tcp.close()
|
||||
Reference in New Issue
Block a user