Siemens CU240B-2 - Page 236

Advanced commissioning
6.4 Setpoint calculation
Converter with the CU240B-2 and CU240E-2 Control Units
236 Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
Example
In the following example, the higher-level control sets the ramp-up and ramp-down times of
the inverter via PROFIBUS.
Image 6-29 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.
Extend telegrams and change signal interconnection (Page 206)
● The control 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.
Further information is provided in the Internet:
FAQ (https://support.industry.siemens.com/cs/ww/en/view/82604741)