70 lines
2.3 KiB
Python
70 lines
2.3 KiB
Python
# hardware/transmitter.py
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from pymodbus.exceptions import ModbusException
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class TransmitterController:
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def __init__(self, relay_controller):
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self.relay_controller = relay_controller
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# 变送器配置
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self.config = {
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1: { # 上料斗
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'slave_id': 1,
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'weight_register': 0x01,
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'register_count': 2
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},
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2: { # 下料斗
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'slave_id': 2,
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'weight_register': 0x01,
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'register_count': 2
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}
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}
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def read_data(self, transmitter_id):
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"""读取变送器数据"""
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try:
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if transmitter_id not in self.config:
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print(f"无效变送器ID: {transmitter_id}")
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return None
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config = self.config[transmitter_id]
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if not self.relay_controller.modbus_client.connect():
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print("无法连接网络继电器Modbus服务")
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return None
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result = self.relay_controller.modbus_client.read_holding_registers(
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address=config['weight_register'],
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count=config['register_count'],
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slave=config['slave_id']
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)
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if isinstance(result, Exception):
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print(f"读取变送器 {transmitter_id} 失败: {result}")
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return None
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# 根据图片示例，正确解析数据
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if config['register_count'] == 2:
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# 获取原始字节数组
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raw_data = result.registers
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# 组合成32位整数
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weight = (raw_data[0] << 16) + raw_data[1]
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weight = weight / 1000.0 # 单位转换为千克
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elif config['register_count'] == 1:
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weight = float(result.registers[0])
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else:
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print(f"不支持的寄存器数量: {config['register_count']}")
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return None
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print(f"变送器 {transmitter_id} 读取重量: {weight}kg")
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return weight
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except ModbusException as e:
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print(f"Modbus通信错误: {e}")
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return None
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except Exception as e:
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print(f"数据解析错误: {e}")
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return None
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finally:
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self.relay_controller.modbus_client.close()
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