wtw DIQ/S 182-PR, System Operating Manual

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System 182 Relay outputs
6 - 15 ba75503e07 04/2012
6.4.2 System monitoring
Function The System monitoring enables monitoring system errors.
To set up the System monitoring function for a relay output you have to
select the System option when linking the relay output (see section
6.2.1).
It can be used to monitor the following system errors:
Settings
Collective error
message
In the case of a Collective error message, the relay opens if one of the
following malfunctions occurs:

One of the sensors properly registered at the controller does not
supply a valid main measured value

One of the sensors properly registered at the controller does not
supply a valid secondary measured value
In any case, the relay remains open for 10 seconds and only closes
when the malfunction is no longer present.
In the following cases, the relay does not open despite an invalid
measured value:

The sensor is being calibrated

The sensor is in the maintenance condition

The sensor is being cleaned with the aid of a valve module in the
system (compressed air operated cleaning system).
Settings Selection Explanations
Power failure On
Off The Power failure On function
monitors the supply voltage in
the
DIQ/S 182-PR. If the voltage
falls below a critical value, the
relay switches.
Collective error On
Off The Collective error
function simultaneously
monitors the proper function of
all sensors. (for details see
below this table)
Action Open For all functions of the System
monitoring , the relay action is
set to Open .