Siemens SINUMERIK 828D

V1: Feedrates
17.4 Feedrate control
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
1409
Example:
You can find more information about block changes and end-of-motion criteria for FINEA, COARSEA and
IPOENDA in:
Reference:
Function Manual, Extended Functions; Positioning Axes (P2), Chapter: Block change
Programmable servo parameter set (SCPARA)
In the part program/synchronized action, the servo parameter set can be specified using SCPARA.
Syntax
SCPARA[<axis>] = <parameter set number>
Meaning
The number of the active parameter set can be read using the system variable $AA_SCPAR.
Boundary conditions
• Different end-of-motion criteria will affect how quickly or slowly part program blocks are completed. This can
have side effects for technology cycles and PLC user parts.
• The PLC user program must be expanded if the servo parameter set is to be changed both inside a part
program or synchronous action and the PLC.
• After POWER ON, the following initial settings are made:
- Percentage acceleration override for all single-axis interpolations: 100%
- End-of-motion criterion for all singleaxis interpolations: FINEA
- Servo parameter set: 1
Part program:
N80 G01 POS[X]=100 FA[X]=1000 ACC[X]=90 COARSEA[X]
Synchronized action:
N100 EVERY $A_IN[1] DO POS[X]=50 FA[X]=2000 ACC[X]=140 IPOENDA[X]
SCPARA: Command for the activation of the specified servo parameter set
<axis>: Name of the channel axis
<parameter set
number>:
Number of the servo parameter set to be activated
Note
The activation of the parameter set specified using SCPARA can be suppressed from the PLC
user program:
DB31,… DBX9.3 = 1 (parameter set specification by SCPARA disabled)
In this case, no message is displayed.