Manual Updating Of Indications; Blockings; Command Supervision - ABB REC 561 User Manual

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Version 1.0-00
2.5 Manual updating of
indications

2.6 Blockings

2.7 Command supervision

Apparatus control
The position indications can be set manually. This feature is only operable
from the station operator place.
There are two different independent functions given:
• Blocking of position updating from bay level (for all apparatus in the
bay) and apparatus level (for each separate apparatus)
• Setting the drive position indication to a defined position by the
operator. Mainly this is used in cases where the drive is in mainte-
nance 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 opera-
tion.
The supervision of the positions of an apparatus is based on the indica-
tions from the program and not the process status. This is to be able to
simulate the positions when operating. In most cases, the process and
indication status are identical.
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 sepa-
rately 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 sta-
tion MMI. Of course, arbitrary signals can be used to cause a blocking.
But the explicit orders come from the station MMI.
Supervision functions stops the program from hanging in the middle of a
command sequence. When the operation time is too long there is an error
indication, and the command sequence resets. Such functions are:
• Supervision of the time between the selection is made and the fol-
lowing execute command. Adjustable time.
• Supervision of the time between the request to override and the fol-
lowing selection. The same timer as above.
• Supervision of abnormal status between the select and execute sig-
nals. If select is given for one direction, it must be followed by exe-
cute for both directions. Or, if the other principle is used, both
selection inputs are followed by execute for the desired direction.
1MRK 580 150-XEN
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