User Guide

SKVF Evaporative Cooler
Modbus Communication Module User Guide
www.neptronic.com
Page | 17
Protocol
Base
Holding
Register
Description
Data Type
Units, Limits, State Texts
Writa
ble
Default Value
15025
415026
Control Signal Type
Unsigned
Scale 1
0 = 0-10Vdc
1 = 2-10Vdc
2 = 4-20mA
3 = 0-20mA
W
0-10Vdc
15026
415027
System Power State
Unsigned
Scale 1
0 = Off
1 = On
RO
Off
15027
415028
Recirculation Request
Unsigned
Scale 1
0 = None
1 = ResetAlarms
2 = Drain
3 = ResetServCnt
4 = ResetWtrServCnt
5 = Filling
W
None
15028
415029
DirectFeed Request
Unsigned
Scale 1
0 = None
1 = ResetAlarms
3 = ResetServCnt
4 = ResetWtrServCnt
W
None