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Binary Status Information in the
Cyclic Channel
The binary status information in the
cyclic channel is transmitted each
time data is exchanged. The status
information is always identical and
always transmitted at the start of the
Binary Status Information in the Cyclic Message
Byte
Bit
WL
Position of circuit breaker
0 = Disconnected position
0/1
1 = Operating position
2 = Test position
3 = Circuit breaker not present
Status of circuit breaker
0 = Not ready
Byte n
2/3
1 = OPEN
2 = CLOSED
3 = Tripped
4
Ready to close
5
Voltage applied to undervoltage release
6
Storage spring is charged
7
Overload warning present
0
An activated setpoint value has been exceeded
1
An alarm signal is currently present
2
PROFIBUS write protection block DPWriteEnable is
activated; write operations are prohibited
3
Status of the free user input on the COM15 module
Reason for last trip
Byte n+1
0 = No trip / last trip acknowledged
1 = Long time (L)
2 = Instantaneous (I)
4/5/6
3 = Short-time (S)
4 = Ground fault (G)
5 = Trip as a result of extended protection function
6 = Overload in neutral conductor
7
Load Shedding warning
The binary status information is identical in all three basic types, and cannot be
Table
changed. It is transmitted with each message from the circuit breaker. Two bytes
3-8
provide information on the most important circuit breaker-related status data.
WL PROFIBUS Communication and Electronic Accessories • July 2004
data message, irrespective of the
basic type that has been selected.
The binary status information
comprises two bytes (not one word,
that is, the bytes do not have to be
reversed so that they can be
displayed in Motorola format).
PROFIBUS Communication
WL Circuit Breaker
3/12
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