13
An interlocking program is used to inhibit the
closing or opening command for a controllable
object in certain situations. In practice, in the
control module SPTO 1D2, the interlocking
enables the control operations, i.e. everything
that is not enabled by the interlocking program
is inhibited.
The default configurations have their own de-
fault interlocking programs, see appendixes
1…3. If a default interlocking related to a de-
fault configuration is not suitable, both configu-
ration and interlocking must be programmed by
the user.
The interlocking system of the control module
reads the status of input channels 1…3 and
4…13. The interlocking program enables the
opening or closing of a controllable object but a
separate open or close command must be given
via the local push-buttons, the serial bus or the
input channels 4…13.
Fig. 8. Operation principle of OPEN and
CLOSE outputs.
When the parameter S198 = 0, the module is in
the program mode, and when the parameter
S198 = 1, the module is in the run mode. In the
run mode the interlocking program is executed
and it cannot be changed by the operator. The
operations enabled by the interlocking program
can be carried out.
In the program mode the interlocking program
is not executed and program changes can be
done. In this mode the control of the objects is
not allowed, except in the case that interlockings
are completely out of use. The interlocking is
programmed or a default interlocking is selected
in the program mode.
The interlocking logic, when used, is always
operative both in local and remote control mode
and if the control commands are given via input
channels 4…13. The interlocking program is
executed every 20 ms. With setting S199 the
interlocking can be taken completely out of use.
Example 5: In example 3 a configuration was
programmed. If the interlockings are not used
the programming continues with the following
commands:
>99WS199:0:XX
; Disable interlockings
>99WV151:1:XX
; Store the programmed parameters
In this case when the interlockings are not
programmed, the value 1 cannot be given for the
parameter S198. However, the status indication
and object control operate as normal because
the interlockings are disabled.
The interlockings are programmed via the SPA
bus using the language according to the DIN
19239 standard. The structure of a program
command is:
OPERATION OPERAND
LOADN 2
OPERATION is a logic command
OPERAND is a code of an input or an output
or a 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 the program
For inputs 1…3 a separate operand code is
defined for each status, open, closed or unde-
fined. The activated status of inputs 4…13 can
be used as an operand in the logic.
Interlocking
OPEN/CLOSE
COMMAND
ENABLE BY
INTERLOCKING
&
OPEN/CLOSE
OUTPUT
t
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