ABB REC 561 User Manual page 309

1MRK 580 150-XEN
Page 6 - 24
Apparatus control
When operating apparatus 1, the general procedure is as follow:
1. Command to set valid operator place for the complete bay. This com-
mand can come from station MMI or the local back-up panel. The
command is given when there is need to change the operator place
only.
2. COMCON receives commands to operate the apparatus. Only com-
mands from the valid operator place are accepted. The first command
is a request to select the apparatus.
3. The BAYCON element receives the request from COMCON.
4. The BAYCON element sends a signal to other control programs to
reserve their bays (if necessary). That is, no operation is allowed there.
Acknowledgement signals should be received.
Other control programs can be placed in the same REC 561 or in other
REC 561s (bay-bay communication).
5. If everything is OK, the select signal is passed through to the SWICON
element and is displayed on the station MMI.
6. The program is now prepared to receive the execute command from the
operator.
7. The closing or opening command is sent to the selected apparatus.
Different kinds of errors can be detected.
Operator related errors, if too long time between:
• The select and the execute commands
• A request to override (reservation and/or interlocking) and the fol-
lowing select command
Apparatus-related errors, if too long time between:
• The apparatus starts to move
• The apparatus reaches the new position
Other apparatus-related errors:
• Pole discordance
• Command error (for example, when the apparatus is blocked or
interlocked)
Other errors:
• Reservation failure
• Binary output board error
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