2.2.8 Commands
The list of commands supported P153 relay is given in table below (refer Sr.No.8). The device will
respond to valid Control Command with ASDU1 and a cause of transmission indicating ‘Positive
(COT-20) / Negative (COT-21) acknowledgement’. The device will respond to commands with invalid
FUN/ INF combination with an ASDU 1, with a cause of transmission indicating ‘negative
acknowledgement’.
2.2.9 Test Mode
It is possible to enable test mode in the relay using either the front panel menu. An event will be
produced to indicate both entry to and exit from test mode. Spontaneous events and cyclic measured
data transmitted whilst the device is in test mode will have a COT of ‘test mode’.
2.2.10 Disturbance Records
The disturbance records are stored in uncompressed format and can be extracted using the standard
mechanisms described in IEC 60870-5-103. This relay supports up-to 5 records.
2.2.11 Configuration
To configure the IED for this protocol, please see the Configuration chapter.
2.2.12 Protocol Mapping
Sr. No. INF Description GI TYP COT FUN
1 Semantics of INFORMATION NUMBER: System Functions in monitor direction
0 End of general interrogation - 8 10 255
0 Time synchronization - 6 8 255
2 Reset FCB - 5 3 160
3 Reset CU - 5 4 160
4 Start/Restart - 5 5 160
5 Power on - 5 6 160
Sr. No. INF Description GI TYP COT FUN
2 Semantics of INFORMATION NUMBER: Status Indications in monitor direction
22 Local parameter setting X 1 11,12 160
27 Opto I/P-1 X 1 1,7,9 160
28 Opto I/P-2 X 1 1,7,9 160
29 Opto I/P-3 X 1 1,7,9 160
134 Password Reset - 2 1,7 124
135 CBOpr Alm X 2 1,7,9 124
Note: ‘X’ under GI heading means DI Status is included in General Interrogation response.