Modbus Read, Write and Override Parameters plus Exception Codes
10.7.10 Communications
Table 10-18 lists all the register addresses and ranges or selections for the function
parameters in Set-up Group Communications.
Table 10-18 Set-up Group – Communications
Parameter
Description
Register
Address
Data
Type
Data Range or
Enumerated Selection
Hex
Decimal
Shed Time
004F
79
INT
R/W
0 = No Shed
1 = 255 sample periods
00A2 162
R/W 0 = Last Mode and Last Output
2 = Manual Mode, Failsafe Output
3 = Automatic Mode
Shed Setpoint
Recall
00A3
163
INT
R/W
0 = To Last Local Setpoint used
1 = CSP
005A 90
FP R/W –20.00 to 20.00
Computer
Setpoint Bias
005B 91
FP R/W –999 to 9999.
Communication
Address
004D
77
FP
R/W
1 - 99
Communications
Type
00E7 231
INT R/W 0 = None
1 = Disable
2 = RS-485 Modbus
3 = Ethernet
IR Port Enable
00F1
241
INT
R/W
0 = Disable
1 =- Enable
Baud Rate
00E8
232
INT
R/W
0 = 4800
1 = 9600
2 = 19200
3 = 38400
Transmit Delay
004E
78
FP
R/W
Response Delay in ms
(1 to 500) +6ms
Floating Point
Byte Order
00E9
233
INT
R/W
0 = Big Endian
1 = Big Endian Byte Swap
2 = Little Endian
3 = Little Endian Byte Swap
Shed Enable
00EA
234
INT
R/W
0 = Enable
1 = Disable
009A
154
R/W
0 = No Shed
Comm Data
Units
00A1
161
INT
R/W
0 = Percent
1 = Engineering Units
Access
Shed Mode and
Output
INT
1 = Manual Mode, Last Output
Computer
Setpoint Ratio
Shed Time
INT
1 = 255 sample periods
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