Data Availability on the
Cubicle
BUS
All modules connected to the
Cubicle
BUS
can request
data from other modules via the bus and generate data
themselves that can be read by other modules.
Each data point in the comprehensive WL Circuit Breaker
data dictionary can only be generated by a single
module—the data source. If this data source (module)
exists, the data points assigned to it also exist.
This information is described and communicated in the
property bytes.
If a data source (module) does not exist, the data point
does not exist either.
Again, the relevant property byte contains this
information.
The following table provides an overview of the internal
Cubicle
BUS
modules and the data point groups (collection
of several data points) assigned to them.
The complete Data Dictionary with a detailed description
of the individual data points is available upon request.
Contact your local sales office.
WL Circuit Breaker
Communication-capable Circuit Breakers
2/7
Cubicle
BUS
Modules
Data point group
ETU745, 748,
BSS
COM15
Metering
Metering
Data points with the same source
755 or 776
Function
Function
Plus
Protection parameter set A
✓
Protection parameter set B (N/A for ETU745 or 748)
✓
Extended protection parameters
✓
✓
Parameter for setpoints
✓
✓
PROFIBUS communication parameters
✓
Parameters for metering settings
✓
✓
Device identification data
✓
✓
Circuit breaker position specifications
✓
Status info. (circuit breaker open/closed,
storage spring, etc.)
✓
Alarms
✓
Trip log
✓
✓
✓
Setpoint messages
✓
✓
Maintenance information
✓
✓
Circuit breaker temperature
✓
Temperature in the cubicle
✓
3-phase currents
✓
Current in neutral, ground-fault current; equip. spec.
✓
3-phase voltage
✓
✓
Power KW, KVAR, KVA
✓
✓
Power factor
✓
✓
Frequency, total harm. distortion, form factor, crest factor
✓
✓
Harmonic analysis
✓
Waveform buffer
✓
Event log
✓
System time
✓
Table 2-2
The table shows which data points from the data dictionary are generated by which
Cubicle
BUS
module,
enabling you to quickly find out which modules are required for which system.
WL PROFIBUS Communication and Electronic Accessories • July 2004
