Function codes - DMP5 - DMP6 - DMP7 - DMP8 - DMPX

Table 1. Modbus function codes

Function code (decimal)	Function code (hexadecimal)	Name	Notes
03	0x03	Read Holding Registers	Class 0
16	0x10	Write Multiple Registers	Class 0
43 / 14	0x2B / 0x0E	Read Device Identification