Date Code 20010719 701 Motor Protection Relay
SEL-2020/2030 & SEL-701PC Compatibility Features
Fast Binary Message Definitions
D.13
A5D2/A5D3 Demand/Peak Demand Fast Meter Message
In response to the A5D2 or A5D3 request, the SEL-701 Relay sends the block
shown in Tabl e D.7 .
Table D.7 A5D 2/A5D3 Dema nd/Peak Deman d Fast Meter M essage
A5B9 Fast Meter Status Acknowledge Message
In response to the A5B9 request, the SEL-701 Relay clears the Fast Meter
(message A5D1) Status Byte. The SEL-701 Relay 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.
Table D.7 A5D2/A5D3 Demand/Peak Demand Fast Meter Message
Data Description
A5D2 or A5D3 Command
xx
Length (specific value of xx based on
relay model, as shown below)
62 bytes
Base Relay
94 bytes Relay with voltages
1-byte 1 Status Byte
xx-bytes Demand/Peak demand quantities in 8-byte IEEE
Floating Point numbers (specific value of xx based
on relay model, as shown below)
48 bytes Base Relay
80 bytes Relay with voltages
8-bytes Time stamp
1-byte Reserved
1-byte 1-byte checksum of all preceding bytes
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