Code Alarm CR3 Manuel de service télécharger pdf (Page 18)

Settings MIQ/CR3; DIQ/CR3

4 - 4

ba76032e01 01/2012

Monitoring limiting

values using one or two

relays

Fig. 4-1 Switching points for relays with the function of a limit indicator

A switching delay (t) can be set up for each relay for switching

processes. This is the time period for which a limiting value must be

exceeded before the relay switches. This prevents frequent switching if

the measured values are close to the limiting value.

1 Upper limit value (relay 1) exceeded

2 Selected switching delay t1 for relay 1 expired

Relay 1 switches

3 Hysteresis for upper limiting value (relay 1) undercut

4 Selected switching delay t1 for relay 1 expired

Relay 1 switches back

5 Lower limit value (relay 2) undercut

Selected switching delay t2 for relay 2 expired

Relay 2 switches

6 Hysteresis for lower limiting value (relay 2) exceeded

Selected switching delay t2 for relay 2 expired

Relay 2 switches back

Time

Measured

value

Hysteresis UL

Hysteresis LL

Relay 1

Relay 2

t2 t2

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 65 66

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Code Alarm CR3 Manuel de service Page 18