Setting Description
with time tags. The client-provided time stamp must be giv-
en in this defined time format. The setup of the local time,
meaning the relative time adjustment to be made between
UTC (GMT) time and local time, is done elsewhere in the
relay.
Overflow mode In case of internal indication event buffer overflow, it is pos-
sible to define whether to keep the oldest or the newest
events in the buffer. The default setting keeps the oldest
events and also adds an overflow event as the last event. It is
possible to omit overflow handling by setting this parameter
to "Keep newest" and defining
OvInd IOA
to value "0".
OvInd IOA Single-point object address for the overflow indication. The
default value is address "60000". Value "0" means that no
overflow indication object exists. When an overflow indica-
tion occurs, the client can trigger a GI request.
OvInd NoGI IOA Single-point object address for overflow indications occur-
ring in objects which are not subject to GI. If overflow from
these objects occurs, a GI request from the client does not
reveal any lost data and thus GI request is unnecessary. It
is possible to make this address equal to the
OvInd IOA
address, and thus generate overflow indication for all data
object types.
Selection timeout Protocol-dependent timeout between select and execute
control commands. The controllable object also has a time-
out setting configured, mainly intended for local control op-
eration. When the control command is performed remotely
from this protocol, the configured timeout is temporarily
overridden by this setting. The default timeout value is 30
seconds.
Counter reporting Counter objects, that is, integrated totals, can be reported
spontaneously or be read on demand by the client using
a counter interrogation request. This setting enables or dis-
ables the spontaneous counter reporting based on freeze
operation. The freeze operation can be given from the client
as a request or also be triggered externally through the pro-
tocol function block’s physical EC_FRZ control input.
Freeze Mode Defines if the counter freeze operation should only freeze
(latch) the current counter values or also reset the counters.
The default setting is "Not in use", meaning that the client
should read (interrogate) the counters on demand.
IT_FRZ Control point for counter freeze operation. This control is
logically connected to the function block’s EC_FRZ input.
For test purposes, it is possible to manually trigger a coun-
ter freeze operation and spontaneous transmission with this
setting.
Cyclical period Event-generating data objects can alternatively be config-
ured for cyclical transmission. This data point specific con-
figuration can be done by Communication Management in
Table continues on the next page
Vendor-specific implementation 2NGA001859 A
30 REX615
IEC 60870-5-104 Communication Protocol Manual
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