Idiomas disponibles
Idiomas disponibles
Parameter
Description
H01
Mode
H02
Device ID
H03
Total number of the units
in the group network
H14
LL strategy selection
8. Set parameter H01 to LL (lead-lag).
9. Set parameter H02 (device ID) to 1 for one unit and 2 for the other unit.
10. Set parameter H03 (total number of controllers connected) to 2.
11. Set parameter H14 (LL strategy selection) to 0 to 250. This is the run time in hours before ACU1 and ACU2
will alternate being the lead unit. When set to zero ACU1 and ACU2 will automatically alternate every cycle.
AIR CONDITIONER UNIT REMOTE COMMUNICATION FEATURES
Air conditioners that include the optional Hoffman network card (RAC module) have remote communication
capabilities utilizing SNMP, Modbus TCP, EtherNet/IP, Profinet Protocol via Ethernet connection, and Modbus
RTU protocol via USB connection. nVent provides Windows interface application software that is available to
download free from nVent support link: https://go.nvent.com/remote-access-control-support-center.
The Windows interface application software supports both Ethernet and USB communication.
USB COMMUNICATION
This communication mode allows direct connection from a laptop (or PC) to the air conditioning unit using a
Mini-b USB cable. As stated above, Modbus RTU is used to communicate between the two devices via USB
connection.
ETHERNET COMMUNICATION
This communication mode allows remote connection to the air conditioning unit utilizing SNMP, Modbus TCP,
EtherNet/IP, and Profinet protocol. Customers that use their own software can download an MIB file for SNMP,
EDS or EtherNet/IP Object file for EtherNet/IP, Coil Register file for Modbus TCP, and Data Point for Profinet.
Note: the Ethernet card (RAC module) has a default IP Address of 192.168.1.2
Both Ethernet and USB communication allow the ability to
•
Read ACU inlet and outlet air temperature
•
Read and change cooling and cooling differential setpoints
•
Read and change heating and heating differential setpoints
•
Read and change the high and low temperature alarm settings
•
Read and change the Gateway IP address, Device IP address, Subnet MASK, Trap IP address, and community string
•
Read and change unit identification
•
Read and change the state of IP address from static to dynamic or vice versa
•
Read and change the air temperature unit of measure (from F to C or vice versa)
•
Read current alarm status
•
Evaporator fan control setting
•
Read and change the control of door open switch
Software And Configuration File Downloads
As stated above, the PC interface tool, MIB file, EDS and EtherNet_IP Object file, Coil Register file, and Data Point
file can be downloaded from remote access control support center link:
https://go.nvent.com/remote-access-control-support-center
89159224
Available Range
SA (stand alone)
PS (primary-secondary)
LL (lead-lag)
1 up to 10
1 up to 10
0-250
© 2022 nVent
LL Settings
LL (lead-lag)
1 or 2
2
0 (Alternate each cycle)
1-250 (Alternate hours)
Default
SA
1
1
0
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