CHAPTER 4: FIELDBUS INTERFACE
PROFIBUS DPV1
MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE
4–21
The following diagram shows an example of the extended diagnostic data sent to the
Profibus master by the MM300. The extended diagnostic data is only provided when one of
the states listed in the above extended diagnostic table has become true. In this example,
the extended diagnostic data has been sent because the "External Start A Alarm" is active.
Such a case would occur when the motor status is running, but no Start A control was
issued by the MM300. In this case, multiple alarms have occurred in the MM300, including
one that indicates that FLA is not set.
Figure 4-7: Profibus - extended diagnostic data
Profibus DPV1
The MM300 relay also supports DPV1 extensions. The device supports Class 1 and Class 2
acyclic reads and writes as well as DPV1 Diagnostics.
Profibus DPV1-Acyclic read/write data
The motor status data can be read acyclically by retrieving the byte lengths indicated
below from the relevant Object, Slot, Index.
Table 4-6: DPV1 Acyclic read data
413
61
5
437
"No Control Source"
55
414
61
6
438
"Clock Not Set"
55
415
61
7
439
"FLA Too High"
55
Byte
Bit
GSE Bit #
Ext.
Diag
Byte
Category
Object Slot
Index Length
(in
Bytes)
Data Item
Format
Status-Motor
0
0
0
2
Motor Status
FC129
0
0
2
2
Extended Status
FC178
0
0
4
2
Thermal Cap Used
F1
0
0
6
4
Time to Overload Trip
F20
