Recording And Acknowledgement Of Commands - Siemens siprotec 7SA522 User Manual

Functions
Control Logic using
CFC

6.19.4 Recording and acknowledgement of commands

Acknowledgement
of commands to the
device front
Acknowledgement
of commands to
local/remote/Digsi
Monitoring of feed-
back information
6-258
Figure 6-134 shows all interlocking conditions (which usually appear in the display of
the device) for three switchgear items with the relevant abbreviations explained in
table 6-12 . All parametrized interlocking conditions are indicated
(see Figure 6-134).
,QWHUORFNLQJ

4 &ORVH2SHQ 6 ² = 3 %
4 &ORVH2SHQ 6 ² = 3 %
4 &ORVH2SHQ 6 ² = 3 %
Figure 6-134 Example of configured interlocking conditions
For zone controlled/field interlocking, control logic can be programmed, using the
CFC. Via specific release conditions the information "released" or "bay interlocked"
are available.
During the processing of the commands, independent of the further message routing
and processing, command and process feedback information are sent to the message
processing center. These messages contain message cause indication. The messag-
es are entered in the event list.
All messages which relate to commands that were issued from the device front "Com-
mand Issued = Local" are transformed into a corresponding response and shown in
the display of the device.
The messages which relate to commands with the origin "Command Issued = Local/
Remote/DIGSI" must be send independent of the routing (configuration on the serial
digital interface) to the initiating point.
The acknowledgement of commands is therefore not executed by a response indica-
tion as it is done with the local command but by ordinary command and feedback in-
formation recording.
The processing of commands monitors the command execution and timing of feed-
back information for all commands. At the same time the command is sent, the moni-
toring time is started (monitoring of the command execution). This time controls
whether the device achieves the required final result within the monitoring time. The
monitoring time is stopped as soon as the feedback information arrives. If no feedback
information arrives, a response "Timeout command monitoring time" appears and the
process is terminated.
Commands and information feedback are also recorded in the event list. Normally the
execution of a command is terminated as soon as the feedback information (FB+) of
the relevant switchgear arrives or, in case of commands without process feedback in-
formation, the command output resets.

7SA522 Manual
C53000-G1176-C119-2