CHAPTER 1: COMMUNICATIONS GUIDE FIELDBUS INTERFACE
MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE 89
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 6: 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 14: DPV1 Acyclic read data
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
0042 Thermal Cap Used F1
0 0 6 4 Time to Overload Trip F20
Start Blocks 0 0 10 2 Starts/Hour Block F1
0 0 12 2 Time Between Starts Lockout F1B
0 0 14 2 Restart Block Lockout F1
Learned 0 0 16 2 Average Motor Load Learned F3
0 0 18 2 Learned Acceleration Time F2
0 0 20 4 Learned Starting Current F10
0 0 24 2 Learned Starting Capacity F1
Counters 0 0 26 2 Number of Motor Starts F1
0 0 28 2 Number of UV Restarts F1
0 0 30 4 Motor Running Hours F9
0 0 34 2 Motor Stopped Hours F1
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