User Manual of EM730 Series Inverter According to the returned data, the “17 (0011H): temperature sensor abnormality protection” of the inverter is enabled, in which the output frequency is 0.00Hz, the output current is 0.00A, the bus voltage is 300V (012CH), the acceleration and deceleration status is “standby”, and the working time is 0 hour. ★： At present, the function code 0x03 of MODBUS protocol supports the reading of multiple function codes across groups. However, it is recommended not to read them across groups in the case of no special requirements, so the customer’s software does not need to be upgraded after our products are upgraded. 1.1.1.2 0x41:
function code used to write a single register or command (without saving) In the remote terminal unit, this function code is used to write a single non-holding register. The request PDU describes the address to be written to the register. The normal response is the response made to the request, which is returned after the register content is written.
Request PDU Response PDU 372 Register value Hi (F19.03) 01 Register value Lo (F19.03) 2C Register value Hi (F19.04) 00 Register value Lo (F19.04) 00 Register value Hi (F19.05) 00 Register value Lo (F19.05) 00 Function code 1 byte 0x41 Address of register 2 bytes 0x0000 - 0xFFFF Register value 2 bytes 0x0000 - 0xFFFF Function code 1 byte 0x41 Address of register 2 bytes 0x0000 - 0xFFFF Register value 2 bytes 0x0000 - 0xFFFF