Carlo Gavazzi WM5-96 - Manual (Page 29)

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WM5-96 Instruction Manual
Programming WM5 96
The instrument is able to manage 2 types of alarms:
1. Real alarm = when the alarm is connected to a digital output
(relay output or open collector output). The activation of a real
alarm causes the switching at fixed light of the “AL” LED on the
front of the instrument.
2. Virtual alarm = when the alarm is not connected to any output. The
activation of a virtual alarm causes the switching at blinking light of the
“AL” LED. In case a virtual alarm and a real alarm occur at the same
time, the latter has the prevalence over the control of the above men-
tioned LED (therefore it will be ON with a fixed light). By exploiting the
OR and AND functions, it’s possible to connect together more than
one virtual alarm and direct them together to one digital output (relay
output or open collector output). In any case the limit of 16 program-
mable alarms will still be valid.
The above drawing explains the operation of the alarms
described in the example. Having the “OR function been cho-
sen for both the alarms, the operation of the digital output can
be represented by two contacts in parallel. The enabling of
only one of the two alarms will enable also the digital output.
Alarm 01
Alarm 02