GE Multilin MM300, Communications Manual, Page: 71 / 146

CHAPTER 1: COMMUNICATIONS GUIDE RS485 INTERFACE (MODBUS RTU)
MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE 67
Performing Commands Using Function Code 10H
Commands can be performed using function code 16 as well as function code 5. When
using FUNCTION CODE 16, the Command Function register must be written with a value of
5. The Command Operation register must be written with a valid command operation
number. The Command Data registers must be written with valid data; this is dependent
upon the command operation.
For example, consider a request for slave 17 to perform command operation 1 (RESET): The
master/slave packets have the following format:
Table 9: Master/slave packet format for performing commands
Bit 18 Comm Start B
Bit 19 Comm Stop
Bit 20 Fuse Fail Inhibit
Bit 21 Phase Reversal Inhibit
Bit 22 Low Aux Voltage Inhibit
Bit 23 UV Restart Inhibit
Bit 24 Drive Available
Bit 25 Drive Available Auto
Bit 26 Drive Available Manual
Bit 27 Reserved
Bit 28 Reserved
Bit 29 PFR Inhibit
Bit 30 PF Restart
FC193 32 bits Ctrl Status 3 (Reserved)
FC194 32 bits Ctrl Status 4 (Reserved)
FC212 16 bits LCD Test Paint Color
0 None
1 Red
2 Green
3 Blue
Code Type Definition
MASTER TRANSMISSION BYTES EXAMPLE DESCRIPTION
SLAVE ADDRESS 1 11 message for slave 17
FUNCTION CODE 1 10 store multiple
setpoints
DATA STARTING ADDRESS 2 00 80 setpoint address 00
80
NUMBER OF SETPOINTS 2 00 02 2 setpoints = 4 bytes
total
BYTE COUNT 1 04 4 bytes of data
DATA 1 2 00 05 data for address 00
80
DATA 2 2 00 01 data for address 00
81
CRC 2 7E CE CRC error code