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A Appendix
A.4.6
Pre-defined CFC Charts
Some CFC Charts are already supplied with the SIPROTEC
Device and System
The single-point indication DataStop that can be injected by binary inputs is converted
Logic
by means of a NEGATOR block into an indication UnlockDT that can be processed
internally (internal single point indication, IntSP), and assigned to an output. This
would not be possible directly, i.e. without the additional block.
Figure A-25
Limit value han-
Using modules on the running sequence "measured value processing", an undercur-
dling MW
rent monitor for the three phase currents is implemented. The output indication is
issued as soon as one of the three phase currents undershoots the set threshold:
Figure A-26
Undercurrent monitoring
376
Link between Input and Output for Transmission Block
®
device.
7UM61 Manual
C53000-G1176-C127-3
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