D.7
Date Code 20050919
Instruction Manual
SEL-387-0, -5, -6 Relay
Configuration, Fast Meter, and Fast Operate Commands
Message Definitions
A5B9 Fast Meter
Status Acknowledge
Message
In response to the A5B9 request, the SEL-387 clears the Settings change
(STSET) bit in the Status Byte of the Fast Meter messages (A5D1, A5D2, and
A5D3). 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
to determine if the scale factors or line configuration parameters have been
modified. No return response is given to the A5B9 request.
A5C2/A5CE Demand/
Peak Demand
In response to the A5C2 or A5C3 request, the relay sends the following block.
Table D.5
A5D1 Fast Meter Data Block
Data
Description
A5D1
Command
80
Message length (128 bytes)
xx
Status byte
Bit: 2; Usage: Self-test warning
Bit: 3; Usage: Self-test warning
Bit: 4, Usage: Settings change
52 bytes
Integers for the following: IAW1, IBW1, ICW1, IAW2,
IBW2, ICW2, IAW3, IBW3, ICW3, IAW4, IBW4, ICW4,
VDC (Imaginary values first, followed by Real values.
8 bytes
Time stamp
63 bytes
Digital banks - targets 0-62
xx
Checksum
NOTE:
The Imaginary value for VDC
is always zero.)
Table D.6
A5C2/A5C3 Demand/Peak Demand
Fast Meter Configuration Messages
(Sheet 1 of 3)
Data
Description
A5C2 or A5C3
Command; Demand (A5C2) or Peak Demand (A5C3)
DA
Message length (218 bytes)
00
No status byte
01
Scale factors in fast meter configuration
00
No scale factors used
14
20 analog input channels
01
One sample per channel
00
No digital banks
00
No calculations
0004
Analog channel offset
FFFF
No time stamp
FFFF
No digital data
494157310000 (IAW1)
Analog channel name
02
Analog channel type -- double precision float
FF
No scale factor
0000
No scale factor offset
494257310000 (IBW1)
02
FF
Содержание SEL-387-0
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