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192
Apparatus control
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The position indications can be set manually. This feature is only available from the sta-
tion operator place.
There are two different independent functions given:
•
Blocking of position updating from bay level (for all apparatuses in the bay) and ap-
paratus level (for each separate apparatus)
•
Setting the drive position indication to a defined position by the operator. This is
mainly used in cases where the drive is in maintenance or is disturbed and a defined
end position is required. This function should cause an automatic update blocking
of the position indication. It can be chosen if blocked position indications cause a
blocking of operation.
The supervision of the positions of an apparatus is based on the indications from the
program and not the process status. This is to be able to simulate the positions when op-
erating. In most cases, the process and indication status are identical.
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There are two bay-oriented blocking functions:
•
Blocking of operation
•
Blocking of updating of the position indication
Both of these different blockings are applicable for each apparatus separately and for
the complete bay.
Blocking of operations can be separately performed for open/close.
Commands for the above described blockings are executed from the station HMI. Of
course, arbitrary signals can be used to cause a blocking. But the explicit orders come
from the station HMI.
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Supervision functions stops the program from hanging in the middle of a command se-
quence. When the operation time is too long there is an error indication, and the com-
mand sequence resets. Such functions are:
•
Supervision of the time between the selection is made and the following execute
command. Adjustable time.
•
Supervision of the time between the request to override and the following selection.
The same timer as above.
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