User Manual of EM760 High-Performance Inverter Below is an example of a request to read the registers F19.00 to F19.05 (relevant information about the last protection): 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. 10.3.3.2 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 256 Error code 1 byte 0x83 Exception code 1 byte 01, 02, 03 or 04 Request Respond Domain name (0X) Domain name (normal) (0X) Domain name (abnormal) (0X) Function code 03 Function code 03 Function 83 Starting address Hi 13 Number of bytes 0C Exception code 03 (example, the same below) Starting address Lo 00 Register value Hi (F19.00) 00 Number (Hi) of registers 00 Register value Lo (F19.00) 11 Number (Lo) of registers 06 Register value Hi (F19.01) 00 Register value Lo (F19.01) 00 Register value Hi (F19.02) 00 Register value Lo (F19.02) 00 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