7.1.4
Start-up Parameter Setting via Fieldbus
The manual configuration procedure described in section 7.1.2 can also be carried out automatically
by the higher-level fieldbus master, i.e. all the drive parameters can be set automatically via the
fieldbus when the control system starts up. In order to automatically set start-up parameters, please
consult the
MOVITRAC
®
31.. Parameter List to establish the fieldbus index and the coding for the
relevant setting from the menu numbers given in section 7.1.2.
The following table shows the indices and codings for start-up parameter setting taken from the
Parameter List.
Menu
no.
Parameter name
Setting
Fieldbus index
(decimal)
Coding
(4 byte hex)
830
FACTORY SETTING
YES
1203
00 00 01 00
841
CONTROL MODE
FIELDBUS
1205
00 00 03 00
600
TERMINAL 42
NO FUNCTION
1150
00 00 11 00
601
TERMINAL 43
NO FUNCTION
1151
00 00 11 00
571
FIELDBBUS TIMEOUT
0.10
1608
00 00 00 10
572
TIMEOUT RESPONSE
RAPID STOP
1609
00 00 00 00
...
drive-specific
...
...
...
...
parameters
...
...
...
120
T11 RAMP UP
1.50
1025
00 00 01 50
121
T11 RAMP DOWN
2.00
1026
00 00 02 00
140
T13 RAMP STOP
0.20
1028
00 00 00 20
The parameters listed in the table can now be transferred to the inverter in the required order, e.g.
via individual write services or via the download parameter block if supported by the option pcb.
However, please note that all other parameters can only be written once the factory settings have
been completely activated.
7.2
Control Using Three Process Data Words
This example describes how to control the inverter using three process data words. The process data
description parameters are set as follows:
P560
PO1 Setpoint Description:
Control Word 1
P561
PI1 Actual Value Description: Status Word 1
P562
PO2 Setpoint Description:
Speed Setpoint
P563
PI2 Actual Value Description: Speed Actual Value
P564
PO3 Setpoint Description:
Ramp
P565
PI3 Actual Value Description: Apparent Current Actual Value
Controlling the inverter using three process data words allows you to implement very powerful
applications as communication between the fieldbus master and the inverter takes place via three
process input and three process output data words.
MO
VI
TR
AC
®
841
E
Q
RUN
BUS
FAULT
FIELDBUS
CONTROL MODE
Status
word 1
Speed
actual value
Apparent current
actual value
Speed
setpoint
Ramp
Control
word 1
Process input data (PI)
Process output data (PO)
00349AEN
Fig. 42: Application example for control of the inverter using three process data words
7
Application Examples
MOVITRAC
®
31.. Fieldbus Unit Profile
61
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
