GE DS200PTCTG1B输入通道回路配置
PQM支持的Modbus功能PQM支持以下功能：•03：读取设定值和实际值•04：读取设定点和实际值·05：执行操作•06：存储单个设定点•07：读取设备状态•08：环回测试•16：存储多个设定点功能代码03/04–读取设定点/实际值Modbus实现：读取输入和保持寄存器PQM实施：读取设置点和实际值对于PQM Modbus实施，这些命令用于读取任何设置点（“保持寄存器”）或实际值（“输入寄存器”）。保持寄存器和输入寄存器是16位（两字节）值，先传输高位字节。因此，所有设定值和实际值都以两个字节的形式发送。一次传输最多可读取125个寄存器。功能代码03和04被配置为可互换地读取设定值或实际值，因为某些PLC不支持这两个值。
PQM Supported Modbus Functions The following functions are supported by the PQM: • 03: Read Setpoints and Actual Values • 04: Read Setpoints and Actual Values • 05: Execute Operation • 06: Store Single Setpoint • 07: Read Device Status • 08: Loopback Test • 16: Store Multiple Setpoints Function Codes 03/04 – Read Setpoints/ Actual Values Modbus implementation: Read Input and Holding Registers PQM Implementation: Read Setpoints and Actual Values For the PQM Modbus implementation, these commands are used to read any setpoint ("holding registers") or actual value ("input registers"). Holding and input registers are 16-bit (two byte) values with the high-order byte transmitted first. Thus, all setpoints and actual values are sent as two bytes. A maximum of 125 registers can be read in one transmission. Function codes 03 and 04 are configured to read setpoints or actual values interchangeably since some PLCs do not support both of them.
