Schweitzer Engineering Laboratories SEL-351-5, Instruction Manual

Page: 606 / 706

D.8
SEL-351-5, -6, -7 Relay Instruction Manual
Date Code 20070117
Configuration, Fast Meter, and Fast Operate Commands
Message Definitions
A5D2/A5D3 Demand/
Peak Demand Fast
Meter Message
In response to the A5D2 or A5D3 request, the relay sends the block shown in
Table D.7 .
A5B9 Fast Meter
Status Acknowledge
Message
In response to the A5B9 request, the relay clears the Fast Meter (message
A5D1) Status Byte. The SEL-351 Status Byte contains one active bit, STSET
(bit 4). The bit is set on power up and on settings changes. If the STSET bit is
set, the external device should request the A5C1, A5C2, and A5C3 messages.
The external device can then determine if the scale factors or line
configuration parameters have been modified.
0000 Scale factor offset in Fast Meter message
51422D000000 Analog channel name (QB–)
02 Analog channel type
FF Scale factor type
0000 Scale factor offset in Fast Meter message
51432D000000 Analog channel name (QC–)
02 Analog channel type
FF Scale factor type
0000 Scale factor offset in Fast Meter message
51332D000000 Analog channel name (Q3–)
02 Analog channel type
FF Scale factor type
0000 Scale factor offset in Fast Meter message
00 Reserved
checksum 1-byte checksum of preceding bytes
Table D.6 A5C2/A5C3 Demand/Peak Demand Fast Meter Configuration
Messages (Sheet 4 of 4)
Data Description
Table D.7 A5D2/A5D3 Demand/Peak Demand Fast Meter Message
A5D2 or A5D3 Command
BE Length
1 byte 1 Status Byte
176-bytes Demand: IA, IB, IC, IN, IG, 3I2, MWA I, MWB I,
MWC I, MW3PI, MVARA I, MVARB I, MVARC I,
MVAR3P I, MWA O, MWB O, MWC O, MW3PO, MVARA O,
MVARB O, MVARC O, MVAR3P O, in 8-byte IEEE FPS
8 bytes Time stamp
1 byte Reserved
1 byte 1-byte checksum of all preceding bytes
NOTE:
When global setting PTCONN
= DELTA, the single-phase power
values [MWA __, MWB __, MWC __,
MVARA __, MVARB __, MVARC __] are
set to zero.