transaction_id = 0 self.protocol_id = 0 self.length = 0 self.unit_id = 0 TcpQuery.build_request() 的实现: def build_request(self, pdu, slave): if (slave < 0) or (slave > 255): raise InvalidArgumentError("{0} Invalid value for slave id".format(slave)) self._request_mbap....
defbuild_request(self, pdu, slave):if(slave <0)or(slave >255):raiseInvalidArgumentError("{0} Invalid value for slave id".format(slave)) self._request_mbap.length =len(pdu) +1# pdu 数据单元的长度 + 1self._request_mbap.transaction_id = self._get_transaction_id()# 获取一个事务 id...
*/ uint16_t t_id; /* TCP port */ //端口 int port; /* IP address */ //IP char ip[16]; } modbus_tcp_t; #define _MODBUS_TCP_PI_NODE_LENGTH 1025 #define _MODBUS_TCP_PI_SERVICE_LENGTH 32 typedef struct _modbus_tcp_pi { /* Transaction ID */ uint16_t t_id; /* TCP port...
Code = 3 [valid] Execute MB function ExceptionCode = 4, 5, 6 [invalid] [valid] Send Modbus Exception Send Modbus Response Response Figure 9 MODBUS Transaction state diagram Once the request has been processed by a server, a MODBUS response using the adequate MODBUS server transaction is ...
Slave ID = 5 Function = "02 Read Discrete Inputs (1x)" Address = 10200 (10201 - 1) Quantity = 1000 Scanrate = 500 5.4. Scanrate The scan rate can be set from 0 to 3600000ms. Note that setting the scan rate lower than the transaction time does not make sense. If a ser...
nio.ByteBuffer; public class ModbusTCPPacket { private int transactionID; private int protocolID; private int length; private int unitID; private int functionCode; private byte[] data; // 解析报文 public static ModbusTCPPacket parse(byte[] bytes) { ModbusTCPPacket packet = new ModbusTCPPacket...
12.2.2.4 在网关内配置阿里于物联网平台账号以及相关 TOPIC 以上的参数的来源请参考上一节.注意,这里的 Keep Alive 的时间如果小亍 30 秒,阿里于会报错"Invalid ClientID",这个幵丌是账号配置错诨. http://www.brimesh.com 12.2.2.5 定义上报数据模板 Alink 协议是阿里于基亍 json 的协议觃范,详细介绍如下...
Object ID 0x02 Object Length 0x05 Object Value "V2.11"If one device needs several transactions to process responses, execute the following transactions. First transaction: Request Response Domain Value Domain Value Function Code 0x2B Function Code 0x2B ...
2024-06-14 21:12:11.239 DEBUG (MainThread) [pymodbus.logging] Adding transaction 9 Furthermore in the log file are only request every 50 seconds, not as requested every 10 seconds!? I would assume that the main problem is that a response comes from the device (energy meter), but it is...
popShort(queue); // Length, which we don't care about. // Create the modbus response. ModbusResponse response = ModbusResponse.createModbusResponse(queue); return new XaMessageResponse(response, transactionId); } Example #12Source File: MasterTest.java From modbus4j with GNU General Publi...