Function codes - HMP1 - HMP3 - HMP4 - HMP5 - HMP7 - HMP8 - HMP9 - HMPX - MMP8 - TMP1

Table 1. Modbus function codes

Function code (decimal)	Function code (hexadecimal)	Name	Notes
03	03hex	Read Holding Registers	Class 0
16	10hex	Write Multiple Registers	Class 0
43 / 14	2Bhex / 0Ehex	Read Device Identification