Operation Manual

Continuous valve actuator CHEOPS control
theben
As of: Jul-11 (Subject to change without notice) Page 54 of 71
5.4 Monitoring the actual value
5.4.1 Application
Case 1: A sensor is connected to interface E2.
Its connection line could be inadvertently interrupted or short-circuited, e.g. during building
or renovation work.
Case 2: The temperature is determined by a different EIB device and sent to Cheops control.
This external temperature transmitter could fail (bus line short circuited etc…) and not longer
be able to perform its function, for a short time or permanently.
Because control is not possible if the actual value fails, this value must be monitored.
5.4.2 Principle
If an external sensor is connected to E2, it is constantly monitored for short-circuit or line
break.
If the temperature is received via Object 2, Cheops control can monitor whether new actual
value telegrams are received at regular intervals.
In both cases, either an emergency program can be started or further control can be handled
by the internal sensor, should the actual value fail.
5.4.3 Practice
The response is defined as follows on the "Actual value" parameter page:
• External sensor on E2
Emergency program (0…100%)
or internal measurement: