Advanced commissioning
7.4 Setpoint calculation
Converter with control units CU250D-2
142
Operating Instructions, 04/2015, FW V4.7.3, A5E34261542B AB
Example
In the following example, the higher-level control sets the ramp-up and ramp-down times of
the inverter via PROFIBUS.
Figure 7-15 Example for changing the ramp-function generator times in operation
Preconditions
●
You have commissioned the communication between the inverter and the control system.
●
Free telegram 999 has been set in the inverter and in your higher-level control system.
See also section: Extend telegrams and change signal interconnection (Page 103).
●
The controller sends the scaling value to the inverter in PZD 3.
Procedure
To interconnect the scaling of the ramp-up and ramp-down times with PZD receive word 3
from the fieldbus in the inverter, proceed as follows:
1.
Set p1138 = 2050[2].
This means that you have interconnected the scaling factor for the ramp-up time with
PZD receive word 3.
2.
Set p1139 = 2050[2].
This means that you have interconnected the scaling factor for the ramp-down time with
PZD receive word 3.
The inverter receives the value for scaling the ramp-up and ramp-down times via PZD
receive word 3.
You will find further information in the Internet at: FAQ
https://support.industry.siemens.com/cs/ww/en/view/82604741
