Sequence Controller - ABB RELION Series Technical Manual

Section 9
Control functions
9.4.4.5
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Figure 337: Initiation after elapsed discrimination time - new shot begins

Sequence controller

When the LOCKED output is active, the AR function is in lockout. This means that new
sequences cannot be initialized, because AR is insensitive to initiation commands. It
can be released from the lockout state in the following ways.
• The function is reset through communication with the RecRs parameter. The
same functionality can also be found in the Clear menu (DARREC1 reset).
• The lockout is automatically reset after the reclaim time, if the Auto lockout reset
setting is in use.
If the Auto lockout reset setting is not in use, the lockout can be
released only with the RecRs parameter.
The AR function can go to lockout for many reasons.
• The INHIBIT_RECL input is active.
• All shots have been executed and a new initiation is made (final trip).
• The time set with the Auto wait time parameter expires and the automatic
sequence initiation is not allowed because of a synchronization failure.
• The time set with the Wait close time parameter expires, that is, the circuit breaker
does not close or the automatic sequence initiation is not allowed due to a closing
failure of the circuit breaker.
• A new shot is initiated during the discrimination time.
• The time set with the Max wait time parameter expires, that is, the master unit
does not release the slave unit.
1MRS758755 A
REC615 and RER615
Technical Manual