User Manual
Logical I/O blocks
General functions
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Prio Use
Prio 6 The block starts the switch-off delay [DlyOff].
Throughout this monitoring time, priority 6 is set to active – the associated value remains at
Stage 2
.
[PrVal] Since priority 6 overrides the effective switch command [DefVal], the [PrVal] output remains at
Stage
2
.
6 Prio 7…16 n/a
Prio 6 1. After expiry of the switch-off delay [DlyOff], priority 6 is released.
2. The effective switch command
Off
from [DefVal] is transmitted to [PrVal].
3. Priority 6 adopts the new value of [PrVal] and is set to active again. At the same time, the minimum
switch-off time [TiOffMin] is started. Priority 6 remains active throughout this monitoring time.
[PrVal] The [PrVal] output changes from
Stage 2
to
Off
.
7 Prio 7…16 n/a
Prio 6 The minimum switch-off time [TiOffMin] has expired. Priority 6 is released.
[PrVal] Since neither priority 6 nor any of the information bits for priority entries (7…16) is active, the
effective switch command is determined by [DefVal].
The output value [PrVal] remains at
Off
.
8 Prio 7…16 At least one of the information bits for priorities (7…16) is active again.
The effective switch command from priority (7…16) is
Stage 1
.
Prio 6 Priority 6 adopts the (still unchanged) present value [PrVal=Off] and is set to active.
At the same time, the switch-on delay [DlyOn] starts. Throughout the delay time, priority 6 remains
active – the associated value remains
Off
.
[PrVal] Since priority 6 overrides the effective switch command from priority (7…16), the [PrVal] output
remains
Off
.
9 Prio 7…16 n/a
Prio 6 1. After expiry of the switch-on delay [DlyOn], priority 6 is released.
2. The effective switch command
Stage 1
from priority (7…16) is transmitted to the [PrVal] output.
3. Priority 6 adopts the new value of [PrVal] and is set to active again. At the same time, the minimum
switch-on time [TiOnMin] is started. Priority 6 remains active throughout this monitoring time.
[PrVal] The [PrVal] output changes from
Off
to
Stage 1
.
10 Prio 7…16 The effective switch command from priority (7…16) switches from
Stage 1
to
Stage 2
.
Prio 6 The minimum switch-on time [TiOnMin] is still active.
Changeover from
Stage m
to
Stage n
.
With multistage switch commands, the monitoring periods are enabled only when switching from OFF
to
Stage n
or from
Stage n
to OFF. When switching from one stage to another (e.g.,
Stage 1
to
Stage
2
), the monitoring periods are not enabled. However, monitoring periods which have already started
remain active – priority 6 adopts the new target value.
[PrVal] A change from
Stage 1
to
Stage 2
would not activate priority 6.
However, since the minimum switch-on time [TiOnMin] is still active, priority 6 still overrides the
effective switch command from priority (7…16).
The [PrVal] output changes from
Stage 1
to
Stage 2
.
11 Prio 7…16 n/a
Prio 6 The minimum switch-on time [TiOnMin] has expired. Priority 6 is released.
[PrVal] When priority 6 ceases to take effect, the [PrVal] output is once again determined by the effective
switch command from priority (7…16).
The [PrVal] output remains at
Stage 2
.