Siemens siprotec 7SA6 User Manual page 480

Functions
Standard
Interlocking
6-298
negative confirmation, the command was rejected. Figure 6-148 shows the messages
relating to command execution and operation response information for a successful
operation 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 manual
entry or abort are not checked, i.e. carried out independent of the interlocking.
(9(17 /2*

    
4 &2 FORVH
    
4 )% FORVH
Figure 6-148 Example of a message when closing the circuit breaker Q0
The standard interlocking includes the checks for each device which were set during
the configuration of inputs and outputs, see Section 5.2.5 under "Binary Outputs for
Switching Devices".
An overview for processing the interlocking conditions in the relay is shown by Figure
6-149.
7SA6 Manual
C53000-G1176-C133-1