Functions
2.7 SYNCHROCHECK 25
SIPROTEC, 7RW80, Manual
C53000-G1140-C233-1, Release date 10.2010
93
2.7.4 Direct Command / Blocking
Parameter 6110 Direct CO can be set to grant a release without performing any checks. In this case, con-
nection is allowed immediately when initiating the synchrocheck function. It is obviously not reasonable to
combine Direct CO with other release conditions.
If the synchrocheck function fails, a direct command may be issued or not, depending on the type of failure
(also see "Plausibility Check" and „SYNC Error“).
Via the binary input „>25direct CO“, this release can also be granted externally.
Blocking the entire synchrocheck function is possible via the binary input „>BLK 25-1“. The message signal-
ing this condition is output via „25-1 BLOCK“. With the blocking, the measurement is terminated and the entire
function is reset. A new measurement can only be performed with a new measurement request.
Via the binary input „>BLK 25 CLOSE“ it is possible to block only the release signal for closing („25
CloseRelease“). When the blocking is active, measurement continues. The blocking is indicated by the
message „25 CLOSE BLK“. When the blocking is reset and the release conditions are still fulfilled, the release
signal for closing is issued.
2.7.5 Interaction with Control and External Control
With Control
Basically, the synchrocheck function interacts with the device control. The switchgear component to be syn-
chronized is selected via a parameter. If a CLOSE command is issued, the control takes into account that the
switchgear component requires synchronization. The control sends a measurement request („25 Measu.
req.“) to the synchrocheck function which is then started. Having completed the check, the synchrocheck
function issues the release message („25 CloseRelease“) to which the control responds by terminating the
switching operation either positively or negatively.
Figure 2-23 Interaction of control and synchrocheck function
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