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6. APPLICATION FUNCTIONS
6.13 Command change
6.13.1 Speed change
Rewriting the command speed followed by turning on the change speed signal (SCHG) changes the speed.
For automatic operation and linear interpolation operation, rewrite the feed speed in the operating point table
and for JOG operation and incremental feed, rewrite the manual feed speed.
Speed change can also be implemented during acceleration or deceleration.
Change speed (SCHG)
Completion of speed
change preparation (SCF)
ON
OFF
Start operation (ST)
ON
OFF
ON
OFF
Acceleration
time constant
Acceleration
time constant
Deceleration
time constant
Speed limit value
Command speed 3
Command speed 1
Command speed 2
Command speed 1 Command speed 3Command speed 2
During the following cases, the "speed change error signal" (SCE) turns ON, and speed will not change.
• Operation stop
• Deceleration due to stop command, rapid stop command, alarm etc
• Home position return
• Home position reset
• The command speed after change is zero or below
API LIBRARY
Use the sscChangeAutoSpeed function to perform a speed change for
automatic operation and linear interpolation operation.
Use the sscChangeManualSpeed function to perform a speed change for
JOG operation and incremental feed.