VLT
®
5000 INTERBUS
MG.10.O1.02 VLT is a registered Danfoss trademark
13
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Process Data.
The VLT®5000 INTERBUS option, offers a flexible
way for the user to customize the number of
Process Data. The process Data of the VLT®5000
is split in two main parts: The first two words that is
reserved for the Drive profile and the user
definable Process data (PCD1 to PCD7).
Process
Data
The first two words are fixed on the VLT®5000
option, whereas the input and output PCD1 to
PCD7 can be selected by the user. The number of
PCDs active in a system is user selectable from 0
(zero) up to 7 words. The number of PCDs is
always selected in pairs (input and output).
For the first 2 fixed words of Data, in the PQ and PI
Data, the Danfoss VLT®5000 offers two different
types of profiles: Drivecom and Danfoss. The
Drivecom profile fullfills the requirement of Drivecom
21, speed setting 1. The Drivecom and Danfoss
profiles will be explained in detail in chapter 7 & 8.
PCD1 to PCD7 can be used in a flexible way to read
and write the VLT®5000 parameters, or high speed
transfer of data to the Syncronizing and positioning
Card (Sync/Pos Card).
Changing the number of PCDs can be done by
accesing the VLT®5000s Parameter 807. The
Parameter can be changed at any time, but the
changes wil first take place at the next powerup, or if
the Master sends out a Bus reset command.
Please note that changing the number of
PCDs also may change the mapping of the
Masters I/O Area (PC/PLC).
The VLT®5000 INTERBUS option features the
disabling of PQ Data. PQ can be made inactive,
this means that the VLT®5000 ingnores the content
of all PQ Data, but the VLT®5000 continues to
update the PI Data. This feature is used during
reconfiguration of a running VLT®5000 system and
ensures that no parameter is changed by mistake.
The drawing below shows the default setting of a
system with no PCD words. The system only
consist of control word and main reference for the
PQ Data, and status word and main actual value
for the PI Data. In this system the Control word is
mapped into the PLCs output memory QW000
and the reference is mapped to the output memory
QW002. The status word of the VLT®5000 is
mapped into the input word IW000 of the PLC and
the feedback (main actual value) is mapped to
IW002.
Fixed
Fixed
User definable
User definable
PI
PQ
STW
MAV
STW MAV
MRV
CTW
CTW
MRV
QW 000
QW 002
IW 000
IW 002
PLC
VLT®5000
INTERBUS
CTW MRV PCD1 PCD2 PCD3 PCD4 PCD5 PCD
STW MAV PCD1 PCD2 PCD3 PCD4 PCD5 PCD6
