Communication Manual

Chapter 2 │System integration 10
Watchdog
Access from software version 4.1-1-00 is capable of supervising communication recieved from a
BMS master. One slave communication protocol can be monitored at a time. If no active
communication from the BMS master is detected before the watchdog timeout elapses, an alarm
message is generated.
BMS watchdog (Activation of protocol)
Upon delivery, the BMS watchdog is disabled as default. Activation and configuration of BMS
watchdog is done via controller web menu Configuration / System settings / Communication / BMS
watchdog
BMS protocol
To enable BMS watchdog, change the setting “None” to the protocol used for BMS communication.
Supported BMS slave protocols are EXOline, Modbus and BACnet.
Watchdog timeout
Configure the watchdog timeout setting between 10 to 3600 seconds (1 hour), default 60 seconds. A
byte counter of received bytes is supposed to change since the last cycle. If counter has not been
changed during the watchdog timeout setting the communication is considered faulty and an alarm
message is generated.
Communication fault BMS master
When a communication fault with BMS is detected, values from BMS should be considered invalid.
The alarm is configured default as Class C with no action.
Sensor value via BMS
Access from software version 4.6-1-00 is capable of… To be complemented!