2.22 Command processing
365
7SA522 Manual
C53000-G1176-C155-3
Table 2-17 Command types and corresponding messages
The plus sign indicated in the message is a confirmation of the command execution:
The command output has a positive result, as expected. A – sign means a negative,
i.e. an unexpected result; the command was rejected. Figure 2-162 shows an example
in the operation annunciations command and feedback of a positively run switching
action of the circuit breaker.
The check of interlocking can be programmed separately for all switching devices and
tags that were set with a tagging command. Other internal commands such as over-
riding or abort are not tested, i.e. are executed independently of the interlockings.
Figure 2-162 Example of an Operational Annunciation for Switching Circuit Breaker 52
Standard
Interlocking
The standard interlocking includes the checks for each switchgear which were set
during the configuration of inputs and outputs, see SIPROTEC
®
4 System Description.
An overview for processing the interlocking conditions in the relay is shown by Figure
2-163.
Type of command Control Cause Message
Control issued Switching CO CO+/–
Manual tagging (positive / nega-
tive)
Manual tagging MT MT+/–
Information state command, Input
blocking
Input blocking ST ST+/– *)
Information state command,
Output blocking
Binary Output
Blocking
ST ST+/– *)
Cancel Command Cancel CA CA+/–
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