Process Value Scaling And Units - Siemens SINAMICS G120X Manual

3 Program configuration
2. At the block parameter "telegram", configure telegram 20 by changing the
value to "20".
Note Additional information on the FB "Drive" can be found in the PCS 7 Advanced
Process Library manual.
https://support.industry.siemens.com/cs/ww/en/view/109760968
3.2.3

Process value scaling and units

The speed setpoint "STW2" and the actual speed "ZSW2" are transmitted as
integers in the range 0 to 16384. The normalization of the raw value into a process
value is done in PCS 7 at the driver block "FbDrive".
In the CFC plan in PCS 7 there are a few places that you can perform the
normalization of the process value. They are as follows:
Table 3-3
Block
FbDrive
MotSpdCl
The values PzdIn2m, PZDIn2Scale and PZDIn2Unit are transmitted via the I/Os
"SpeedLink", "SpeedScale" and "SpeedUnit" to the MotSpdCL block.
•
Adapt the scaling to suit your application. For G120X applications with pumps
and fans, values in percent or revolutions per minute are recommended.
Table 3-4
1077
1082
1083
1342
Note Units of measurement in PCS 7 are coded according to the IEC 611582
standard. You can find a full list of all units of measure in the APL manual:
https://support.industry.siemens.com/cs/ww/en/view/109760968/98818690699
Integration of a SINAMICS G120X frequency converter in PCS 7
Entry ID: 109793986, V1.0,
I/O
PZDIn2Unit
PZDIn2Scale.High
PZDIn2Scale.Low
SPLiScale.High
SPLiScale.Low
SP_HiLim
SP_LoLim
SP_OpScale.High
SP_OpScale.Low
SP_Unit
Code
Hz
1/s
1/min
%
09/2021
Description
Unit of the actual value
Upper limit, actual value
Lower limit, actual value
Maximum setpoint
Minimum setpoint
Upper setpoint limit
Lower setpoint limit
Upper limit for bar graph
Lower limit for bar graph
Unit for labeling on the faceplate
Unit
Hertz
Revolutions per second
Revolutions per minute
Percent
Description
21