GE Multilin SR489 Manuel D'utilisation page 158

TOPOGRAPHIE MÉMOIRE
The SR489 stores up to 64 cycles of A/D samples in a waveform capture buffer each time a trip occurs. The waveform capture buffer is
time and date stamped and may therefore be correlated to a trip in the event record. To access the waveform capture memory, select the
channel of interest by writing the number to the Waveform Capture Channel Selector (30F5h). Then read the waveform capture data from
address 3100h-31BFh, and read the date, time and line frequency from addresses 30F0h-30F4h.
Each communications port can individually select a Waveform Channel Selector of interest by writing address 30F5h. This way the front
port, rear port and auxiliary port can read different Waveform Channels simultaneously.
The channel selector must be one of the following values:
Value
0
1
2
3
4
5
6
7
8
9
Each communications port can individually select a Edit Setpoint Group of interest by writing address 1342h. This way the front port,
rear port and auxiliary port can read and alter different setpoints simultaneously.
Each communications port can individually set the Passcode Access by writing address 88h with the correct Passcode. This way the
front port, rear port and auxiliary port have individual access to the setpoints. Reading address 203h, COMMUNICATIONS SETPOINT
ACCESS register, will provide the user with the current state of access for the given port. A value of 1 read from this regist er indicates
that the user has full access rights to changing setpoints from the given port.
6
6-14
Selected A/D samples
Phase A line current
Phase B line current
Phase C line current
Neutral-end phase A current
Neutral-end phase B current
Neutral-end phase C current
Ground current
Phase A to neutral voltage
Phase B to neutral voltage
Phase C to neutral voltage
Scale Factor
500 counts equals 1xCT primary
500 counts equals 1xCT primary
500 counts equals 1xCT primary
500 counts equals 1xCT primary
500 counts equals 1xCT primary
500 counts equals 1xCT primary
500 counts equals 1xCT primary or 1A for 50:0.025
2500 counts equals 120 secondary volts
2500 counts equals 120 secondary volts
2500 counts equals 120 secondary volts
6. COMMUNICATIONS
6.5.4 WAVEFORM CAPTURE
6.5.5 DUAL SETPOINTS
6.5.6 PASSCODE OPERATION