7SR224 Argus Description of Operation
Section 6: Other Features
6.1 Data Communications
Two communication ports, COM1 and COM2 are provided. RS485 connections are available on the terminal
blocks at the rear of the relay (COM1). A USB port, (COM 2), is provided at the front of the relay for local access
using a PC.
Other rear mounted communication ports are available as an optional extra - two fibre optic communication ports
with ST connectors plus IRIG B (COM 3 and COM 4), a RS232 port plus IRIG B (COM 3) or a RS485 port plus
IRIG B (COM 3).
Communication is compatible with Modbus-RTU, IEC60870-5-103 FT 1.2 and DNP 3.0 transmission and
application standards.
For communication with the relay via a PC (personal computer) a user-friendly software package, Reydisp
Evolution, is available to allow transfer of relay settings, waveform records, event records, fault data records,
Instruments/meters and control functions. REYDISP EVOLUTION is compatible with IEC60870-5-103.
Data communications operation is described in detail in Section 4 of this manual.
6.2 CB Maintenance
Several CB trip operations counters are provided:
CB Total Trip Count:
Increments on each trip command issued. During an
autoreclose sequence, when the target count is reached the
relay will perform one Delayed Trip and lockout*.
CB Delta Trip Count: Additional counter which can be reset independently of the
Total Trip Counter. This can be used, for example, for
recording trip operations between visits to a substation.
CB Count to AR Block:
Displays the number of CB trips experienced by the CB.
When the target is reached the relay will only do 1 Delayed
Trip to Lockout.
CB Frequent Ops Count Logs the number of trip operations in a rolling window period
of one hour. During an autoreclose sequence, when the
target count is reached the relay will perform one Delayed
Trip and lockout*.
CB LO Handle Ops
Displays the number of CB (lock out) LO Handle Ops
experienced by the CB. When the target is reached the relay
will only do 1 Delayed Trip to Lockout.
*NB: If Delayed Trips are not assigned in the AUTORECLOSE PROT’N menu the relay will not trip.
An I
2
t counter is also included; this can provide an estimation of contact wear and maintenance requirements. The
I
2
t value at the time of trip is added to the previously stored value.
Binary outputs can be mapped to each of the above counters, these outputs are energised when the user defined
Count Target or Alarm Limit is reached.
The counters do not increment for manual operations.
6.3 Output Matrix Test
The feature is only visible from the Relay fascia and allows the user to operate the relays functions. The test of
the function will automatically operate any Binary Inputs or LED’s already assigned to that function.
Any protection function which is enabled in the setting menu will appear in the Output Matrix Test.
©2010 Siemens Protection Devices Limited Chapter 1 Page 65 of 70
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