16-
8
750/760 Feeder Management Relay GE Power Management
16.3 MODBUS PROTOCOL 16 COMMUNICATIONS
16
16.3.7 FUNCTION CODE 05H - EXECUTE OPERATION
This function code allows the master to perform various operations in the 750/760. Available operations are
shown in Table 16–5: SUMMARY OF OPERATION CODES FOR FUNCTION 05H on page 16–9.
The following table shows the format of the master and slave packets. The example shows a master device
requesting the slave device 11 to perform a reset. The hi and lo CODE VALUE bytes always have the values
‘FF’ and ‘00’ respectively and are a remnant of the original Modbus definition of this function code.
Table 16–4: MASTER/SLAVE PACKET FORMAT FOR FUNCTION CODE 05H
MASTER TRANSMISSION SLAVE RESPONSE
PACKET FORMAT EXAMPLE (HEX) PACKET FORMAT EXAMPLE (HEX)
SLAVE ADDRESS 11 SLAVE ADDRESS 11
FUNCTION CODE 05 FUNCTION CODE 05
OPERATION CODE - hi 00 OPERATION CODE - hi 00
OPERATION CODE - lo 01 OPERATION CODE - lo 01
CODE VALUE - hi FF CODE VALUE - hi FF
CODE VALUE - lo 00 CODE VALUE - lo 00
CRC - lo DF CRC - lo DF
CRC - hi 6A CRC - hi 6A
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