GMC-I Messtechnik GmbH
R2500–39
Limit Value Monitoring
Start-up inhibiting
: Alarm suppression is active during start-up (configuration:
ALx
=
SUP
) until temperature has exceeded the lower limit level for the
first time. During cooling, suppression is active until temperature has fallen below the upper limit value for the first time. It is active when auxiliary power
is activated, if the current setpoint is changed or setpoint 2 is activated, or if switching takes place from Off to
Automatic Operation.
Limiter
If a controller needs to be deactivated in the event of a limit value violation within the control loop, the controller must be configured as a limiter (
LIM
=
YES
).
The limiter can be combined with all
controller types
.
– The limiter responds to the
second limit value
, which must be set and configured accordingly.
– The controller is deactivated as soon as a second limit value is violated. The controller becomes active again when there are no more limit value errors.
– If the controller is to remain continuously deactivated after limit value monitoring has been triggered, the alarm memory must be activated
(configuration:
AL2
=
Stor
).
– The limit value errors must then be cleared in order to reactivate the controller. This is accomplished by pressing the
key and acknowledging
the
Quit AL
display within 5 seconds with the
key.
– These errors can also be cleared with the binary input, if it has been configured to clear limit value errors (
In 1
=
quit
).
Alarm Relay, NO Contact
Alarm Relay, NC Contact
AL L
AL H
Relative Limit Values
AL L
AL H
Absolute Limit Values
Actual V
Setpoint
Hysteresis adjustable with
HYSt parameter
Summary of Contents for R2500
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