GE Power Quality Meter Series User Manual

7-6 PQM Power Quality Meter GE Power Management
7.2 MODBUS FUNCTIONS 7 MODBUS COMMUNICATIONS
7
7.2.4 FUNCTION CODE 05 – BROADCAST COMMAND
Modbus Implementation
: Force Single Coil
PQM Implementation
: Execute Operation
This function code allows the master to request all PQMs on a particular communications link to Clear All
Demand Data. The PQM will recognize a packet as being a broadcast command if the SLAVE ADDRESS is
transmitted as 0. Below is an example of the Broadcast Command to Clear All Demand Data.
MESSAGE FORMAT AND EXAMPLE:
Clear All Demand Data on all PQMs (operation code 34).
Table 7–3: MASTER/SLAVE PACKET FORMAT FOR BROADCAST COMMAND
MASTER TRANSMISSION BYTES EXAMPLE DESCRIPTION
SLAVE ADDRESS 1 11 message for slave 17
FUNCTION CODE 1 05 execute operation
OPERATION CODE 2 00 22 clear all demand data (operation code 34)
CODE VALUE 2 FF 00 perform function
CRC 2 2D E1 CRC error code
SLAVE RESPONSE BYTES EXAMPLE DESCRIPTION
Slave does not respond back to the master.

GE Power Quality Meter Series Specifications

General

Brand	GE
Model	Power Quality Meter Series
Category	Measuring Instruments
Language	English