Profibus Dpv1; Profibus Dpv1-Acyclic Read/Write Data - GE MM300 Manual

CHAPTER 4: FIELDBUS INTERFACE

Profibus DPV1

Profibus DPV1-Acyclic read/write data

MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE
413
414
415
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
The MM300 relay also supports DPV1 extensions. The device supports Class 1 and Class 2
acyclic reads and writes as well as DPV1 Diagnostics.
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
Category Object Slot
Status-Motor 0 0
0 0
0 0
0 0
Byte Bit GSE Bit #
61 5 437
61 6 438
61 7 439
Index Length Data Item
(in
Bytes)
0 2 Motor Status
2 2 Extended Status
4 2 Thermal Cap Used
6 4 Time to Overload Trip
PROFIBUS DPV1
"No Control Source"
"Clock Not Set"
"FLA Too High"
Ext.
Diag
Byte
55
55
55
Format
FC129
FC178
F1
F20
4–21