Skip to content
ezeioDocs
  1. Drivers
  2. Driver catalog
  3. Marvair Commstat4

Marvair Commstat4

Marvair · Commstat4

Marvair Commstat4
Manufacturer
Marvair
Product
Commstat4
Protocol
Modbus
Updated
2023-11-13
Driver ID
198

Notes

Commstat4 is a Modbus interface and control unit for Marvair air handler units.

Registers 65

#NameUnitDescription
1F/C°F
2Changeover daysdays
3Cool set point°F
4Heat set point°F
5High building temp 1 set point°F
6High building temp 2 set point°F
7Low building temp set point°F
8Blower on
9High voltage input enable / alarm output enable
10Anti-short cycle timers
11Stage 1 Differential°F
12Stage 2 differential°F
13Off differential°F
14Blower off time delays
15Operational units when generator is used
16Smoke auto resetmin
17Smoke relay
18ECON mode enable
19Multiple sensors
20Aux. 1 relay
21Aux. 2 relay
22Excessive cycle
23AC / HP system
24Master/slave
25Stage 3 differential°F
26Stage 4 differential°F
27Stage 5 differential°F
28Stage 6 differential°F
29Stage 7 differential°F
30Stage 8 differential°F
31Stage 9 differential°F
32Stage 10 differential°F
33Stage 11 differential°F
34Stage 12 differential°F
35Total Number of UnitsN
36Stage 2 differential in econ cooling mode
37Controller On/Off
38Lead unitN
39Master controller inputs
40Master controller's unit #1 inputs
41Master controller's unit #2 inputs
42Master controller's unit #1 outputs
43Master controller's unit #2 outputs
44Output command master to slave unit #1
45Output command master to slave unit #2
46Saved value of master unit #1 outputs
47Saved value of master unit #2 outputs
48Saved value command master to slave unit #1
49Saved value command master to slave unit #2
50Master controller lockout status
51Current stage
52Current temperature°F
53Time left for the comfort mode operation.
54Slave controller inputs
55Slave controller's unit #1 inputs
56Slave controller's unit #2 inputs
57Slave's #1 temp sensor reading°F
58Slave's #2 temp sensor reading°F
59Slave's #3 temp sensor reading°F
60Slave's unit #1 output status
61Slave's unit #2 output status
62Slave controller lockout status
63Smoke alarm
64Low temp alarm
65High temp alarm