User Manual

Logical I/O blocks
General functions
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Priority 6
Priority entry 6 is used to forward the switch commands resulting from [PrioArr] to the [PrVal] output after
a delay. This enables you to implement both switch-on and switch-off delays and minimum ON and OFF
times.
For this purpose, the internal block logic imports the Present value [PrVal] into the priority 6 entry. While
the delay times referred to above are running, priority 6 is set to active and so takes priority over priority
levels 7…16. Outside these delay times, priority 6 is always inactive.
Locating this function in the [PrioArr] between priorities 1…5 and 7…16 has the following consequences:
● Commands with a priority level of 1…5 are always executed immediately, irrespective of any currently
active delay times.
● Commands with a priority level of 7…16 are always overridden by any currently active delay times.
Unlike all the other entries in [PrioArr], the commands and information bit for priority 6 are generated
exclusively by the BO, MO, BVAL and MVAL blocks. A priority 6 entry cannot be written from an external
source.
The switch-on and switch-off delay
As soon as one of the commands with a priority of 7…16 determines the [PrVal] which will therefore cause
the present state of [PrVal] to change, the entry for priority 6 is set up as follows:
If the switch-on delay [DlyOn] or switch-off delay [DlyOff] is greater than 0:
1. Priority 6 adopts the still unchanged present value [PrVal].
2. Priority 6 is set to active.
2
5
8
14
16
15
13
9
7
6
3
1
PWR_CTL
CMD_CTL
ValPgm / EnPgm
PrVal
ValCrit / EnCrit
Desigo CC
ValOp / EnOp
BOAO MVAL
e.g. local manual
switch
Local control
e.g. anti-icing
protection
e.g. emergency stop
Priorities 1, 4, 7, 15
via data flow interconnection
Local control
General BACnet command
Life safety
Critical value
Monitoring hours
Manual operation
Program control
Priority 6
Control within block
Priorities 2, 5, 8, 14, 16
via BACnet command
Higher control