GE Industrial Solutions A Series Lighting Control Panelboards Modbus Register Map - Manual (Page 9)

A Series ® Lighting Controller Modbus Register Map
Introduction
3
Function
Code Command Purpose Register Group
01 Read Coil Status Read results or status of coils Command coils, binary outputs
02 Read Input Status Read physical binary inputs Input status
03 Read Holding Registers Reading the setpoint registers
Fixed value registers, setpoint
registers
04 Read Input Registers Reading actual value registers
Schedule event registers and
feedback inputs
05 Force Single Coil
Setting the signal coil or
executing single command
Command coils, binary outputs
06 Preset Single Register Write data into register Setpoint registers
15 Force Multiple Coils Write data to multiple outputs Binary outputs
16 Write Multiple Registers Write data into multiple register Setpoint registers, etc.
Table 1. Function codes supported by the Lighting Controller.
Function Name Purpose
2 Invalid register The Register address is not recognized or defined by the Lighting
Controller.
3 Invalid data value Data out of range
83h Partial register read Partial property read
84h Partial register write Partial property write
85h Write protect violation Write to a read only property.
86h Single write entry violation Multiple entries on single write packet, which is restricted to one entry
modification due to array shuffling. NOTE: Only for LG lighting
outputs and common group properties.
89h Invalid property read/write Fail to read/write a property due to restriction.
Table 2. Exception response codes.
Objects Supported by the
Lighting Controller
The Lighting Controller supports the object types listed in
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Register Types
All registers are defined as read only except coil and
setpoint registers. Fixed-value register addresses start at
0201 and are read by function code 04. Actual-value
register addresses start at 1000 and are read by function
code 03. Event register addresses start at 20001 and are
read by function code 04.
All registers consist of 16-bit integers, with values less than
256 stored in the lower byte. Inputs, outputs, and binary
values use Modbus coils and input bit order.
The Modbus device is mapped to a BACnet database.
The Modbus object ID for BACnet object type is given in
Table4.