sepam 20 user manual - Schneider Electric

2
Network diagnosis
functions
2/10
Disturbance recording
Operation
This function is used to record analog signal and logical states.
Record storage is activated according to parameter setting by a triggering event (see
Control and monitoring functions - Disturbance recording triggering).
The stored event begins before the triggering event and continues afterwards.
The record comprises the following information:
b values sampled from the different signals
b date
b characteristics of the recorded channels.
The files are recorded in FIFO (First In First Out) type shift storage: the oldest record
is erased when a new record is triggered.
Transfer
Files may be transferred locally or remotely:
b locally: using a PC which is connected to the pocket terminal connector and has
the SFT2841 software tool
b remotely: using a software tool specific to the remote monitoring and control
system.
Recovery
The signals are recovered from a record by means of the SFT2826 software tool.
MT10181
Principle
stored record
Characteristics
triggering event
(1)
Record duration x periods before the triggering event (1)
total 86 periods
Record content Set-up file:
date, channel characteristics, measuring transformer ratio
Sample file:
12 values per period/recorded signal
Analog signals recorded (2) 4 current channels (I1, I2, I3, I0) or
4 voltage channels (V1, V2, V3)
Logical signals 10 digital inputs, outputs O1, pick-up
Number of stored records 2
File format COMTRADE 97
(1) According to parameter setting with the SFT2841 (default setting 36 cycles).
(2) According to sensor type and connection.
time
PCRED301005EN - 06/2008