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SRC-131 Hotel Controller Manual
17
6.3.1
Data Format
Protocol:
Modbus RTU
Byte Format:
1 Start Bit, 8 Data Bits, 1 Stop Bit, No Parity
Address:
1 to 255
Baud:
4800 / 9600 / 19200 BPS
Holding
Register
Type
Value
Comments
40001
Read Only
Device ID
Always Returns “131”
40002
Read Only
Firmware Version
Divide By 100 (e.g. Version 2.36 = 236)
40003
Read Only
DIP Switch
Settings
Binary Count
Sw 1 = 1, Sw2 = 2, Sw3 = 4, Sw 4 = 8 etc
40004
Read / Write
Occupancy Status
0 = Room is Unoccupied
1 = Room is Occupied
Note - Modbus can write “0” holding the
room unoccupied regardless of the occupancy
input.
Modbus cannot override the occupancy input and hold the
SRC-131in occupied mode.
40005
Read Only
Bell Status
0 = Bell Is Silent
1 = Bell Is Chiming
40006
Read / Write
Door Station
Status
0 = Normal - No Activity
1 = “Make Up Room” Active
2 = “Do Not Disturb” Active
40007
Read / Write
HVAC Status
0 = Air Conditioning Off (1 or 3 Fan Speed)
1 = Low Speed Ventilation ( 1 or 3 Fan Speed)
2 = Med Speed Ventilation (3 Fan Speed Only)
3 = High Speed Ventilation (3 Fan Speed only)
4 = Air Conditioning ON (1 or 3 Fan Speed)
40008
Read / Write
Fan Status
3 Fan Speed Mode
0 = Low (Fan Auto)
1 = Med ( Fan Auto)
2= High (Fan Auto)
3 = Auto Fan Speed (Fan Auto)
4 = Low (Fan On)
5 = Med (Fan On)
6 = High (Fan On)
7 = Auto Fan Speed (Fan On)
1 Fan Speed Mode
0 = Fan Auto
4 = Fan On
40009
Read / Write
User Set Point
Deg C = 0.5°C Steps
Deg F = 1°F Steps
Value / 10 ( e.g. 23.5°C = 235)
40010
Read / Write
Contact
Reception
Notification
0 = Off
1 = Show Contact Reception on LCD
SRC-131LCD will flash “Contact Reception”
on LCD and sound chime. User may accept alert by touching
any button on SRC-131
40011
Read Only
Room
Temperature
Value / 10 (e.g. 21.7c = 217)
40012
Read / Write
Temperature
Display
0 = Show Room and Set Temperature
1 = Show Set Temperature Only
40013
Read/Write
C/F Display
0 = Deg C format
1 = Deg F format
40014
Read / Write
User Set Point
High Limit
5°C to 30°C Range (41°F-86°F) in 1°C/F Steps
1:1
40015
Read / Write
User Set Point
Low Limit
5°C to 30°C Range (41°f-86°F) in 1°C/F Steps
1:1
40016
Read / Write
Dead Band
0.5°C to 5.0°C in 0.5°C Steps
1.0°F to 10.0°F in 1°F Steps
Value / 10 (e.g. 1.5°C Dead Band = 15)
