36
Controller User Manual
The Override Stages Screen allows the ability to do the following:
• Force the fan motors to run at the maximum allowable speed (Figure 50),
• Force a pre-cooling system flush (Figure 31), and
• Force EC fan motors to reverse rotation at the speed specified in Figure 60.
All EVAPCO Controllers are able to communicate with a BAS via Modbus RTU. Consult the supplied wiring diagram for the proper
wiring configuration. The BAS configuration screen allows the various Modbus communication parameters to be set.
Figure 62
The Manual Overrides Screen.
Figure 63
The Modbus Parameter Configuration Screen.
Within the service settings submenu, there are several screens that allow for the adjustment of the working hours and sensor probe
values. The Working Hours Set Screen allows the working hours to be adjusted or set to zero as a reset. This could be used to
reset an hour counter after maintenance or inspection has been performed.
The baud rate of the Modbus RTU signal: 1200, 2400, 4800,
9600, 19200, 38400.
The node address of the EVAPCO Controller: 1 to 207.
The parity of the Modbus RTU signal: NONE, EVEN, ODD
The number of stop bits: 1 or 2.
19200
1
EVEN
1
Parameter
Description
Default
Table 26
The Modbus RTU communication parameters.
Baud Rate
Address
Parity
Stop Bit