Storing Comm Address Using The Broadcast Command - GE MOTOR MANAGER 2 Instruction Manual

6 COMMUNICATIONS
The default setting for the communications address from the factory and after a 'Setpoint Dump' is
OFF. The communication speed and parity default settings are 9600 baud, no parity. We have pro-
vided a facility to store the comms. address to any MM2 without using the keypad and display (typi-
cally chassis mount MM2s).
Make sure the master is transmitting to the MM2 at 9600 baud, no parity. After installing the MM2
and ensuring communications is hooked up, cycle control voltage to the MM2 you wish to set the
address for. This will allow you to send a broadcast command with the new comms. address for the
MM2. The address must be set within 2 minutes of cycling power. Once the new address is stored or
the 2 minutes have elapsed, the MM2 will ignore all further attempts at changing the comms.
address unless power is cycled again. The address is changed using a broadcast command to
comms. address 0 and a command function code. Note: This procedure can be accomplished using
®
the MM2PC software. See Chapter 8: MM2PC® SOFTWARE for details.
For example, to store communications address 25 to a new MM2 without a display, we have the fol-
lowing master/slave packet format. The master/slave packets have the following format:
Table 6–10: MASTER/SLAVE PACKET FORMAT (BROADCAST)
MASTER TRANSMISSION
SLAVE ADDRESS
FUNCTION CODE
DATA STARTING ADDRESS
NUMBER OF SETPOINTS
BYTE COUNT
DATA 1
DATA 2
DATA 3
CRC
SLAVE RESPONSE
SLAVE ADDRESS
FUNCTION CODE
DATA STARTING ADDRESS
NUMBER OF SETPOINTS
CRC
GE Power Management

6.4.2 STORING COMM ADDRESS USING THE BROADCAST COMMAND

BYTES
1
1
2
2
1
2
2
2
2
BYTES
1
1
2
2
2
MM2 Motor Manager 2
EXAMPLE DESCRIPTION
00 broadcast command for all units
10 store setpoints
11 60 setpoints address 1160
00 03 3 setpoints = 6 bytes total
06 6 bytes of data
00 05 data for address 1160
00 10 data for address 1161
00 19 data for address 1162
0B 8C CRC error code
EXAMPLE DESCRIPTION
00 message from slave responding
10 store setpoints
11 60 setpoint address 1160
00 03 3 setpoints
84 FB CRC error code
6.4 APPLICATIONS
6-15
6