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Premium Commercial Controls
ERV
SYSTEM MONITORING
12.7 MODBUS
The Modbus utilizes the standard registers and references them as an offset. For example, an
offset of Input Register 0 is Register 30,001 and an offset for Holding Register 0 is register
40,001. All values are shown in decimal format. The implementation also uses Coils and
Discrete Inputs in a similar manner.
12.6.4 Installing the BACnet License via USB Connection
Prerequisites:
u
PC
u
Micro USB cable with the ability to plug in with a PC and have the controller appear as a USB
drive in your Windows Explorer
Steps
1. Carefully insert the micro USB end into the controller front under the door with the wide side
to the bottom.
2. You should see a folder called “UPGRADE” in the controller. Put the file in that folder. 3. Once
finished you will be prompted to press “ENTER” again.
You should now see the license is installed in the controller screen.
12.7.1 Modbus TCP Connection
FIGURE 13.2.0 ETHERNET CONNECTION
Connection of Modbus TCP requires a physical cable
connection to the RJ45 jack on the controller. Prior to
making the wiring connections, the controller is to be
tested to verify proper control of the ERV unit under
local control.
12.7.2 Modbus TCP Settings
First, set the IP address of the controller in the same
General Settings
area.
u
Set DHCP to Off if static
u
If Static, set the IP, mask, and gateway if required.
u
Set Update?
To Yes (Power will need to be cycled. This can be done after all of the
other settings.)
NOTE: The controller
will only support
private IP addresses
which start with
192, 172, or 10.
