ABB REC 561, User Manual, Page: 288 / 643

Apparatus control
ABB Network Partner AB
1MRK 580 150-XEN
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Version 1.0-00
Or if the other principle is used, setting of both selection inputs (close and
open select) simultaneously followed by the direction (close or open) on
the execute input. Any other combination causes a reset of the operation.
Because both select/execute principles are supported from the operator
point of view, two selection and two execute inputs are implemented.
To inform operator(s) at the station MMI that the apparatus is selected
from another operator place, there are indications for each apparatus from
which operator place (remote, station or local) it is selected. This is to
inform that the apparatus is already selected; so a selection from that oper-
ator place is not possible.
When a selection is made, the apparatus control goes back into idle state
for one of these reasons:
• After a successful operation
• No open or close command within specified time
• When reservation failed
• When an interlock occurred
• In blocking state
• Cancelling of the operation
When the apparatus is in idle state, it is possible to make a new selection
from the valid operator place.
The operator can override the interlocking and/or the reservation from the
station MMI and from the local operator place.
Of course arbitrarily orders can be sent to the REC 561, but only orders
involved with the apparatus control are described below.
The apparatus control handles different kind of commands coming from
different operator places. Interprete the local operator place as the back-up
panel.
Remote
These commands are supported from remote operator place:
• Select, open/close
• Execute, open/close
• Cancel the selection
Station
These commands are supported from the station MMI:
• Select, open/close
• Execute, open/close
• Cancel the selection