To adapt the signals from the local HMI or from an external local/remote switch, the
function blocks LOCREM and LOCREMCTRL are needed and connected to
QCBAY.
Permitted Source To Operate (PSTO)
The actual state of the operator place is presented by the value of the Permitted Source
To Operate, PSTO signal. The PSTO value is evaluated from the local/remote switch
position according to Table
. In addition, there are two parameters that affect the
value of the PSTO signal.
If the parameter
AllPSTOValid
is set and LR-switch position is in Local or Remote
state, the PSTO value is set to 5 (all), that is, it is permitted to operate from both local
and remote level without any priority. When the external panel switch is in Off
position the PSTO value shows the actual state of the switch that is, 0. In this case it
is not possible to control anything
If the parameter
RemoteIncStation
is set and the LR-switch position is in Remote state,
the PSTO value is set to 2 (Station or Remote), that is, it is permitted to operate from
both station and remote level without any priority.
Table 402:
PSTO values for different Local panel switch positions
Local panel
switch positions
PSTO
value
AllPSTOValid
(setting
parameter)
RemoteInc
Station
(setting
parameter)
LocSta.CtlVal
(command)
Possible
locations that
shall be able to
operate
0 = Off
0
-
-
-
Not possible
to operate
1 = Local
1
Priority
-
-
Local Panel
1 = Local
5
No priority
-
-
Local or
Remote level
without any
priority
2 = Remote
6
Priority
No
TRUE
Station level
2 = Remote
7
No priority
No
FALSE
Remote level
2 = Remote
2
Priority
Yes
-
Station or
Remote level
2 = Remote
5
No priority
-
-
Local, Station
or Remote
level without
any priority
3 = Faulty
3
-
-
-
Not possible
to operate
Blockings
The blocking states for position indications and commands are intended to provide the
possibility for the user to make common blockings for the functions configured within
a complete bay.
The blocking facilities provided by the bay control function are the following:
1MRK502052-UEN B
Section 14
Control
711
Technical manual
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