D-8 Configuration, Fast Meter, and Fast Operate Commands Date Code 990430
SEL-351P Manual Técnico
A5E0 Fast Operate Remote Bit Control
The external device sends the following message to perform a remote bit operation:
Data
Description
A5E0 Command
06 Length
1-byte Operate code:
00
-
07 clear remote bit RB1
-
RB8
20
-
27 set remote bit RB1
-
RB8
40
-
47 pulse remote bit for RB1
-
RB8 for one processing interval
1-byte Operate validation: 4 ⋅ Operate code + 1
checksum 1-byte checksum of preceding bytes
The relay performs the specified remote bit operation if the following conditions are true:
1. The Operate code is valid.
2. The Operate validation = 4 ⋅ Operate code + 1.
3. The message checksum is valid.
4. The FASTOP port setting is set to Y.
5. The relay is enabled.
Remote bit set and clear operations are latched by the relay. Remote bit pulse operations assert
the remote bit for one processing interval (1/4 cycle).
It is common practice to route remote bits to output contacts to provide remote control of the
relay outputs. If you wish to pulse an output contact closed for a specific duration, SEL
recommends using the remote bit pulse command and SEL
OGIC
®
Control Equations to provide
secure and accurate contact control. The remote device sends the remote bit pulse command; the
relay controls the timing of the output contact assertion. You can use any remote bit
(RB1 through RB8), and any SEL
OGIC
Control Equation timer (SV1 through SV16) to control
any of the output contacts (OUT101 through OUT107). For example, to pulse output contact
OUT104 for 30 cycles with Remote Bit RB4 and SEL
OGIC
Control Equation timer SV4, issue
the following relay settings:
via the SET L command,
SV4 = RB4 SV4 input is RB4
OUT104 = SV4T route SV4 timer output to OUT104
via the SET command,
SV4PU = 0 SV4 pickup time = 0
SV4DO = 30 SV4 dropout time is 30 cycles
To pulse the contact, send the A5E006430DDB command to the relay.
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