CARLO GAVAZZI Class 0.2 A/V Instruction Manual download pdf (Page 29)

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

ront of the instrument.

2. Virtual alarm = when the alarm is not connected to any output. The

ctivation 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 r

epresented by two contacts in parallel. The enabling of

only one of the two alarms will enable also the digital output.

Alarm 01

Alarm 02

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CARLO GAVAZZI Class 0.2 A/V Instruction Manual Page 29