CommStat
™
4
Modbus Adapter
Installation & Operation
Page 9
CommStat™ 4
Modbus Read Registers
The adapter supports Modbus TCP/IP read requests from the Master system through port 502 of the configured IP address of the interface adapter.
The read registers are detailed in the table below.
Register
Source
Value
Description
Comments
40001
Master Master's firmware revision number
[Self-explanatory]
Must be less than 255
40002
Master Protocol Version Number (3 or 4)
[Self-explanatory]
[Self-explanatory]
40003
Master Setting #2
F/C
0: Celsius, 1: Fahrenheit
40004
Master Setting #3
Changeover days
Half Days, range 1 to 14
40005
Master Setting #4
Cool set point
See CommStat
TM
4 manual
40006
Master Setting #5
Heat set point
See CommStat
TM
4 manual
40007
Master Setting #6
High building temp 1 set point
See CommStat
TM
4 manual
40008
Master Setting #7
High building temp 2 set point
See CommStat
TM
4 manual
40009
Master Setting #8
Low building temp set point
See CommStat
TM
4 manual
40010
Master Setting #9
Blower on
0: Off, 1: On
40011
Master Setting #10
High voltage input enable / alarm output enable
40012
Master Setting #11
Anti-short cycle timer
Number of minutes (see CommStat
TM
4 manual)
40013
Master Setting #12
Stage 1 Differential
See CommStat
TM
4 manual
40014
Master Setting #13
Stage 2 differential
See CommStat
TM
4 manual
40015
Master Setting #14
Off differential
See CommStat
TM
4 manual
40016
Master Setting #15
Blower off time delay
See CommStat
TM
4 manual
40017
Master Setting #16
Operational units when generator is used
[Self-explanatory]
40018
Master Setting #17
Smoke auto reset
0: Manual Reset, 3 to 10: # minutes until auto reset
40019
Master Setting #18
Smoke relay
0: Normally Open, 1: Normally Closed
40020
Master Setting #19
ECON mode enable
0: No, 1: Yes, 2: Verizon special setting
40021
Master Setting #20
Multiple sensors
0: No, 1: Yes
40022
Master Setting #21
Aux. 1 relay
0: Normally Open, 1: Normally Closed, 2: Off
40023
Master Setting #22
Aux. 2 relay
0: Normally Open, 1: Normally Closed, 2: Off
40024
Master Setting #23
Excessive cycle
0: Off, Non-Zero: # cycles allowed in 2 hour period
40025
Master Setting #24
Language
0: English, 1: Spanish, 2: French
40026
Master Setting #25
AC / HP system
0: HP, 1: One AC, 2: Two AC
40027
Master Setting #26
Master/slave
0: Slave, 1: Master
40028
Master Setting #27
Stage 3 differential
See CommStat
TM
4 manual
40029
Master Setting #28
Stage 4 differential
See CommStat
TM
4 manual
40030
Master Setting #29
Stage 5 differential
See CommStat
TM
4 manual
40031
Master Setting #30
Stage 6 differential
See CommStat
TM
4 manual
Table 1:
CommStat™4
Modbus Read Registers
