Trebor Q-Series Di Water Heater - Manual (Page 20)

PAGE 20 Q-SERIES DI HEATER OPERATION / MAINTENANCE MANUAL
F1 F2 F3 F4 F5
Figure 5-4: Plot Page
5.3 REMOTE OPERATION OVER AN EXTERNAL HARDWARE
INTERFACE
When the system is in the remote operation mode (see section 5.2.c) the
heating of water can be enabled or disabled, the temperature set point
can be adjusted and monitored, and the status of alarms can be
monitored remotely over an external hardware interface; however, the
temperature set point cannot be adjusted nor can the heating of water be
enabled or disabled locally through the display panel as described in
section 5.2.a.
5.3.a Remote Communication via Modbus/RTU
The default remote operation communication protocol is Modbus/RTU
over an RS232 hardware interface. See Table 5-2, for
the heater’s
register and coil address mapping. For information regarding the
Modbus communication protocol please visit
www.modbus.org .