Annunciations To The Modbus Master - Siemens SIPROTEC 7SJ61 Technical Data Manual

4

Annunciations to the Modbus master

Annunciations to the Modbus
master
Protection pickup
Protection TRIP
7SJ61/62/63 6MD63 - Modbus
C53000-L1840-C001-01
Note
When analysing the annunciations of the SIPROTEC device in the
Modbus master, it should be noted that due to the cycle period of the
Modbus system (period between two following queries of the same data
of the Modbus slave) temporary changes of an annunciation's value (ON
and OFF within one cycle) may eventually not be recognized.
This applies in the first place for protection annunciations.
Protection annunciations which indicate the status protection pickup are
active only for the period of time of the protection pickup.
The parameter M
INIMUM
address = 210) allows setting of the minimum duration of the TRIP
command.
This time setting applies to all protection functions which may cause a
TRIP signal. After a protection TRIP, the corresponding protection
annunciations transmit the value ON for the programmed minimum time
duration.
D TRIP C
URATION OF
4
(parameter
OMMAND
4-1