SINAMICS G120 (CU2x0x-2): Changing Setpoint between AI0 and AI1 using free function blocks
How can you change the Setpoint between AI0 and AI1 by using free function blocks in SINAMICS G120
The free function block NSW (numeric change-over switch) can be used to implement the function.
Change over speed setpoint between AI0 and AI1 by DI3 by Using FFBs in CU240B/E-2.
Parameters setting and description
|P20221=5||Assign NSW0 to runtime group 5 (time slice of 128 ms)|
|P20222=610||Run sequence of the time block within runtime group 5|
|P20218=755.0||Connect the AI0 to the 1st input of NSW0. r755.0 = AI0 actual value in percent|
|P20218=755.1||Connect the AI1 to the 2nd input of NSW0. r755.1 = AI1 actual value in percent|
|P20219=722.3||Connect DI3 to the signal source of switch setting of NSW0. r722.3 = the status of DI3|
|P1070=20220||Connect the output of NSW0 to the signal source of speed setpoint|
According to the parameter setting, AI0 is selected when DI3 is in low level. And AI1 is selected when DI3 is in high level.
NSW0 is computed every 128 ms as it is assigned to runtime group 5. The maximum delay time is 128 ms from action of DI3 to change-over completion.
SINAMICS G120 and G120P: Where do I find an instruction describes the functionality of the free function blocks? Entry-ID: 85168215