13 Cooperative Recorder Group
D02771R02.60 TESLA 4000 User Manual 13-13
Record deletion for a Cooperative Group IED is handled the same way as re-
cord transfer. Deleting a record from the On IED branch of a Cooperative
Group IED automatically deletes the associated record from each group mem-
ber. If the group record is not deleted, the individual records can be retrieved
and viewed from a group member using standard (i.e. non-cooperative mode)
methods
13.4 Required Cooperative Mode Settings
Cooperative mode operation requires key settings to be consistent on all re-
corders in the group. This section identifies those settings and provides guide-
lines for selecting appropriate values.
Table 13.5: Time Control Settings (Utilities->Time setup screen
Setting Effect on Cooperative Operation Guideline
Incoming IRIG
Time Signal
Properties
May cause a UTC time mismatch
between recorders that results in
trigger messages being rejected
Setting should be the same on all
group members
Recorder Time
Zone Setting
May cause a UTC time mismatch
between recorders that results in
trigger messages being rejected
Setting should be the same on all
group members
Recording Control Settings
(Utilities->Recording
Trigger Mode In Duration mode, triggers from
other recorders result in a record
of Maximum Record Length as
their duration is not evident to the
receiving recorder
Setting should be Edge on all
group members
Pre-Trigger
Mode
Records with a pretrigger time dif-
ferent from that of the Master
Recorder’s record will be left out of
the combined group record
Setting must be the same on all
group members. At least 0.1 sec-
onds of pre-trigger is recom-
mended
Normal Record
Length
Records of different duration can
be combined into a group record.
The group record can be dis-
played, but not exported in COM-
TRADE format
Settings should be the same if
COMTRADE export of the com-
bined record is desired
Maximum
Record Length
Controls the capability of each
recorder to automatically extend a
recording to include subsequent
triggers
A minimum of 0.1 second of auto-
extension (Maximum Record
Length > Normal Record Length)
is recommended to avoid multiple
overlapping records in the case of
near-coincident triggers.
TESLA Device Configuration
(Identification screen in the Configuration editor)
Setting
Effect on Cooperative Operation Guideline
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