ABB REO 517, Applications Manual, Page: 219 / 440

209
Apparatus control
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When operating apparatus 1, the general procedure is as follow:
1. Command to set valid operator place for the complete bay. This command can come
from station HMI 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 commands from the
valid operator place are accepted. The first command is a request to select the ap-
paratus.
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 sig-
nals should be received. Other control programs can be placed in the same control
terminal or in other control terminals (bay-bay communication).
5. If everything is OK, the select signal is passed through to the SWICON element and
is displayed on the station HMI.
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 following 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