Function Code 05H - GE MM3 Instruction Manual

6 COMMUNICATIONS
Modbus Implementation: Force Single Coil
MM3 Implementation: Execute Operation
This function code allows the master to request a MM3 to perform specific command operations. The com-
mands supported by the MM3 are listed in Section 6.4: APPLICATIONS on page 6–13.
For example, to request slave 17 to execute operation code 1 (reset), we have the following master/slave
packet format:
Table 6–4: MASTER/SLAVE PACKET FORMAT FOR FUNCTION CODE 05H
MASTER TRANSMISSION
SLAVE ADDRESS
FUNCTION CODE
OPERATION CODE
CODE VALUE
CRC
SLAVE RESPONSE
SLAVE ADDRESS
FUNCTION CODE
OPERATION CODE
CODE VALUE
CRC
The commands that can be performed by the MM3 using function code 05 can also be initiated by using func-
tion code 10.
See Section 6.2.9: FUNCTION CODE 10H on page 6–11 for an example of performing commands using func-
tion code 10.
GE Power Management
BYTES EXAMPLE DESCRIPTION
1 11 message for slave 17
1 05 execute operation
2 00 01 operation code 1
2 FF 00 perform function
2 DF 6A CRC error code
BYTES EXAMPLE DESCRIPTION
1 11 message from slave 17
1 05 execute operation
2 00 01 operation code 1
2 FF 00 perform function
2 DF 6A CRC error code
MM3 Motor Manager 3
6.2 MM3 SUPPORTED FUNCTIONS

6.2.5 FUNCTION CODE 05H

6
6-7