KMB NOVAR-1 Series, Operating Manual

Page: 40 / 77

Novar 1xxx KMB systems
40
4.1.19.1 Alarm Indication
In order to indicate nonstandard compensation conditions, the instruments feature an Alarm LED in
the front panel and an Alarm relay potential-free contact accessible at a connector in the rear panel. At
Novar 10xx models, that are not equipped with the dedicated Alarm relay, it is possible to use any of
highest two outputs for Alarm signalling ( see parameter 26).
Indication of a nonstandard condition occurrence shows as flashing Alarm LED and closed Alarm
relay contact. In standard condition this LED is dark and the relay contact open. At Novar 10xx
models, the relay state polarity is presetable, but it is always opened if voltage outage.
Nonstandard condition, at which alarm should be indicated, can be specified in the side branch of
parameter 30. Any of the eight conditions shown in Table 4.5 can trigger the alarm indication.
Alarm indication from any nonstandard condition can be selected by editing such a condition in the
side branch of parameter 30. The settings can take 4 different values:
1.
01-0 01-0 01-0 01-0
... condition 1 (undercurrent) is not indicated (neither does it trigger actuation –
see description further below)
2.
01-S 01-S 01-S 01-S
... condition 1 (undercurrent) is indicated (but it does not trigger actuation)
3.
01-A 01-A 01-A 01-A
... condition 1 (undercurrent) is not indicated (but it triggers actuation)
4.
01-2
01-2 01-2
01-2
... condition 1 (undercurrent) is indicated (and it triggers actuation)
Alarm indication can be set for any other condition in the same manner as shown for condition 1 in the
above example. For some conditions, alarm actuation can be specified besides indication (see
description further below).
Alarm indication can be triggered by one or a combination of some conditions specified. Alarm
indication will be triggered when the condition has been detected continuously for the time specified in
Table 4.5 as the 1
st value; the 2 nd value (after „/“) defines elapse time to stop alarm indication after the
condition disappears. The condition that has triggered alarm indication can then be checked in the
alarm status (in the side branch of parameter 40).
Unlike alarm actuation described below, alarm indication setting has no effect on the instrument’s
control process.
Besides conditions mentioned above, alarm indication will also be triggered by a condition when at
least one nonzero capacitive section has not been specified (when entering section values manually)
or identified (in the automatic section power recognition process). Under this condition, flashing
C=0 C=0 C=0 C=0
is shown on the numeric display.
4.1.19.2 Alarm Actuation
Independently of the alarm indication function, you can set alarm actuation for some of the
nonstandard conditions. Actuation means intervention in the control process, especially interruption of
controller operation, usually with subsequent disconnection of compensation sections. See list of
actuations in Table 4.6.
If you require that the controller respond to occurrence of an above nonstandard condition with its
corresponding actuation as shown in the table, you have to set the condition of choice in the side
branch of parameter 30 to
A AA A
or
2 2 2 2
(see previous chapter).
Conditions not shown in this table do not trigger any actuations, hence they can not be set this way
either.