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Interlocking
The interlocking program is used to inhibit the
close or open command for a controllable ob-
ject in certain situations. In practice, the inter-
locking program of the control module SPTO
1D6, enables the control operations, i.e. every-
thing that is not enabled by the interlocking
program is inhibited.
The default configurations have their own de-
fault interlocking programs, see appendices
1...3. If a default interlocking related to a de-
fault configuration is not suitable, both configu-
ration and interlocking must be set by the user.
The interlocking program of the control mod-
ule reads the status of input channels 1...3 and
4...13 and enables the opening or closing of a
controllable object when the actual open or close
command is given vith the local push-buttons,
the serial bus or the input channels 4...13.
OPEN/CLOSE
COMMAND
&
ENABLE BY
INTERLOCKING
Fig. 10. Operation principle of the control func-
tions.
When parameter S198 = 0, the control module
is in the setting mode, and when parameter S198
= 1, the module is in the operation mode. In
the operation mode the interlocking program
is executed and it cannot be changed by the
operator. Only those operations enabled by the
interlocking program can be executed.
In the setting mode the interlocking program is
not executed and program changes can be done.
In the setting mode the control of the objects is
not allowed, except for the case that interlock-
ings are completely out of use. The interlock-
ing is set or a default interlocking is selected in
the setting mode.
The interlocking program, when used, is per-
manently operative both in the local and remote
control mode, even when the control commands
are given via input channels 4...13. The inter-
locking program is executed every 20 ms. The
interlocking program can be taken completely
out of use with parameter setting S199.
t
OPEN/CLOSE
OUTPUT
Example 5
In example 3 a configuration was set. If no inter-
lockings are to be used the setting continues with
the following commands:
>99WS199:0:XX
; Set interlockings out of use
>99WV151:1:XX
; Store the set parameters
In this case when the interlocking program is
not used, parameter S198 cannot be given the
value 1. The status indication and object con-
trol is however operating normally because the
interlockings are set out of use.
The interlockings are set via the SPA bus by
using a programming language according to the
DIN 19239 standard. The structure of a pro-
gram command is:
OPERATION
LOADN 2
OPERATION is a logic command
OPERAND is the code number of an input or
an output or the number of a temporary or a
special register.
The following logic commands are used:
LOAD
Reads the status of an input or a
register
LOADN Reads the inverted status of an input
or a register
AND
And operation
ANDN
And not operation
OR
Or operation
ORN
Or not operation
OUT
Writes to an output or a register
END
End of program
For input channels 1...3 a separate operand code
is defined for each status, open, closed or unde-
fined. The active status of input channels 4...13
can be used as operands in the logic.
OPERAND
17
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