GE Industrial Solutions A Series Lighting Control Panelboards Modbus Register Map - Manual (Page 29)

A Series ® Lighting Controller Modbus Register Map
Special Registers
23
Special Registers
In addition to the 66 breaker outputs, the lighting
controller has several special outputs (Table 40) to control
other features on the main board.
These special outputs are mapped to MODBUS coil
registers 67-70 and are accessed by function code
01/05/15.
Note: These outputs are not for general use. Don’t write to
these registers without detailed knowledge of their
purpose, operation and possible consequences.
Reg Contents Units /
Range Type
67 [BO67] – Output
Sweep
On/Off R/W
68 [BO68] - Device
Alarm Status
On/Off R/W
69 [BO69] - Voltage
Input
On/Off R/W
70 [BO70] - MSP430
Reset
On/Off R/W
Table 40.Special output Registers
Sample packets
The following are samples of packets generated by
requests for specific groups of outputs.
Read BO Registers 67 to 70
Table 41 is an example of a request to read BO67-BO70
(Function 1, BO67 – O70).
Request Response
Field Name He
x
Field Name Hex
Device Address 01 Device
Address
01
Function 01 Function 01
Register Address Hi 00 Byte Count 01
Register Address Lo 42 Outputs Status
70 – 67
0E
Quantity of Outputs Hi 00 Packet CRC Hi
Quantity of Outputs Lo 04 Packet CRC Lo
Packet CRC Hi
Packet CRC Lo
Table 41. Request to read BO67-BO70
Write “On” to output Value Reg67 (Function 5 Single
Write, BO67 in map). Table 42 is an example of a single
write to BO67.
Request Response
Field Name H
ex Field
Name Hex
Device Address 01 Device
Address
01
Function 05 Function 05
Register Address Hi 00 Register
Address Hi
00
Register Address Lo 42 Register
Address Lo
42
Output Value Hi FF Output Value
Hi
FF
Output Value Lo 00 Output Value
Lo
00
Packet CRC Hi Packet CRC
Hi
Packet CRC Lo Packet CRC
Lo
Table 42. Request to write Register 67