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6. APPLICATION FUNCTIONS
6.13.2 Change of time constants
After rewriting the time constant, turning the change time constant signal (TACHG, TDCHG) on causes the
time constant to change. Time constants can be designated separately as the acceleration time constant and
the deceleration time constant.
For automatic operation and linear interpolation operation rewrite the time constant in the operating point table
and for JOG operation and incremental feed, rewrite the manual feed time constant.
Change acceleration
time constant (TACHG)
Completion of preparations
for changing acceleration
time constant
(
TACF
)
ON
OFF
Start operation (ST)
ON
OFF
ON
OFF
Acceleration time constant 2
Acceleration time constant 1
Speed limit value
Command speed
Acceleration time constant 2Acceleration time constant 1
During the following cases, the "acceleration time constant change error signal" (TACE) or the "deceleration
time constant change error signal" (TDCE) turns on, and time constant will not change.
• Operation stop
• Deceleration
• Home position return
• Home position reset
API LIBRARY
Use the sscChangeAutoAccTime or sscChangeAutoDecTime functions to
perform a change of time constants for automatic operation and linear
interpolation operation.
Use the sscChangeManualAccTime or sscChangeManualDecTime functions
to perform a change of time constants for JOG operation and incremental
feed.