CGS XT-T1 Betriebsanleitung Seite 128

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An alarm may be caused by:
• Partial or total failure of heating elements or other parts in the control loop
• Reversal of the control direction (for example, „direct" instead of „inverse")
Functional limitations
The control loop monitoring is not active in the following cases:
• Autotuning active
• Manual mode
• Output level is not at its maximum limit (heating mode) or minimum limit (cooling mode)
Parameter dimensioning
The controller parameters must be optimally adjusted for the control loop monitoring to function correctly, e.g. using
autotuning. If alarms occur temporarily, despite the plant operating correctly, either the re sponse time must be incre-
ased, or the monitoring band must be narrowed. To do this, plot the ap proach curve, e.g. with the startup function of
the setup program.
9.9.5 Output level monitoring (setup only)
Output level monitoring monitors the output level in the corrected state. The output level must be within a definable
range around a mean output level. If it is not, an alarm is issued.
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Actual value
Output level
Start of monitoring
Alarm period
Product:
Temperature controller XT-T1
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Monitoring band
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Max. output level (for example, 100 %)
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Response time
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End of monitoring
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Revision 2.0 – Issue September 2018
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