wtw DIQ/S 182-XT-4, Operating Manual

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System 182-XT-4 Outputs
6 - 15 ba75753e06 12/2014
6.4.2 System monitoring
Function The System monitoring enables the monitoring of 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-XT-4. If the voltage
falls below a critical value, the
relay switches.
Collective error On
Off The Collective errorOnfunction
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.