If
Ramp set-point
434 = 2 (only reference line value), then this reference line value is
limited to fmin. Please remember that the sign in front of fmin at reference value = 0
is derived from the sign in front of the last reference line value
≠
0.
After Power On, the reference line value is limited to +fmin.
For
Ramp set-point
434 = 3, the sign in front of the overall reference value results
from the sum of the internal reference frequency value and the reference line value.
The reference values can be read out from the frequency inverter with the help of the
KP500 control unit or VPlus operating software.
Actual values
Parameter
Contents
Format
Internal reference fre-
quency
228
Internal reference value from the frequency
reference value channel
xxx.xx Hz
Reference bus frequen-
cy
282
Reference line value from the CANopen
®
bus xxx.xx Hz
Reference ramp frequen-
cy
283
Sum of in reference line value
xxx.xx Hz
14.3.4
Example Sequence
To start the drive without Position control (
Configuration
30
≠
x40), the correct se-
quence has to be sent from the PLC.
1 Control word =
0x0000
Disable voltage
3 Control word =
0x0006
Shutdown
4 Control word =
0x0007
Switch On
5 Control word =
0x000F
Enable Operation
OR
1 Control word =
0x0000
Disable voltage
5 Control word =
0x000F
Enable Operation
In non motion control configurations (Parameter
Configuration
30 ≠ x40) the second
(shortened) sequence can be used because state transition 4‘ is available in these
configurations.
130
CM-EtherCAT
07/13