40
MOVITRAC
®
31.. PROFIBUS Fieldbus Interface
4
The PROFIBUS-FMS
Interface
To access all drive parameters via PROFIBUS-FMS, you must add the value 1000 dec to the index
shown in the parameter list to access the fieldbus index. In general, you can apply the following
formula:
Fieldbus Index = Parameter Index + 1000 dec
The object description in the object list is identical for all drive parameters. Even parameters that
can only be read are given the attribute Read All/Write All in the object list, as the inverter itself car-
ries out the appropriate testing and if necessary supplies a return code. The following table shows
the object descriptions of all drive parameters.
4.2.2
Objects for Process Data Communication
For process data communication via FMS six communications objects are available which are
described in the following table.
Index:
Parameter Index + 1000
dec
Object code:
7 (Simple variable)
Data type index:
10 (Octet string)
Length:
4 Byte
Local address:
-
Password:
-
Access groups:
-
Access rights:
Read all / Write all
Name[16]:
-
Extension length:
-
Fieldbus
index
Index
Functionality
988
1 process output data word
(1 PO)
1) Only FMS mode: Transmission of a process output data word from
the master to the inverter with the FMS service
Write.
2) In the mixed mode (DP/FMS): Reading a process output data word
specified by the DP master (e.g. for visualization) with the FMS service
Read.
989
2 process output data words
(2 PO)
1) Only FMS mode: Transfer of two process output data words form
master to the inverter with the FMS service
Write.
2) In mixed mode (DP/FMS): Reading two process output data words
specified by the DP master (e.g. for visualization) with the FMS service
Read.
990
3 process output data words
(3 PO)
1) Only FMS mode: Transfer of three process output data words from
the master to the inverter with the FMS service
Write.
2) In mixed mode (DP/FMS): Reading three process output data words
specified by the DP master (e.g. for visualization) with the FMS service
Read.
991
1 process input data word (1 PI)
Reading a process input data word (PD 1) with the FMS service
Read.
992
2 process input data words (2 PI)
Reading two process input data words (PD1, PD 2) with FMS service
READ.
993
3 process input data words (3 PI)
Reading three process input data words (PD1, PD2, PD3) with FMS
service
Read.
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