Parameters and firmware blocks
159
25
Firmware block:
SPEED REF RAMP
(25)
This block
• selects the source for the speed
ramp input
• adjusts acceleration and
deceleration times (also for jogging)
• adjusts acceleration/deceleration
ramp shapes
• adjusts ramp time for emergency
stop OFF3
• forces the output of the ramp
generator to a defined value
• shows the ramped and shaped
speed reference value.
Block outputs located in other
parameter groups
3.04 SPEEDREF RAMPED (page 101)
25.01 SPEED RAMP IN FW block: SPEED REF RAMP (see above)
Shows the source of the speed ramp input. The default value is P.3.3, ie, signal 3.03 SPEEDREF
RAMP IN, which is the output of the SPEED REF MOD firmware block.
Value pointer: Group and index
25.02 SPEED SCALING FW block: SPEED REF RAMP (see above)
Defines the speed value used in acceleration and deceleration (parameters 25.03/25.09 and 25.04/
25.10/25.11). Also affects fieldbus reference scaling (see Appendix A – Fieldbus control, section
Fieldbus references on page 428).
0…30000 rpm Speed value for acceleration/deceleration.
25.03 ACC TIME FW block: SPEED REF RAMP (see above)
Defines the acceleration time, ie, the time required for the speed to change from zero to the speed
value defined by parameter 25.02 SPEED SCALING.
If the speed reference increases faster than the set acceleration rate, the motor speed will follow the
acceleration rate.
If the speed reference increases slower than the set acceleration rate, the motor speed will follow the
reference signal.
If the acceleration time is set too short, the drive will automatically prolong the acceleration in order
not to exceed the drive torque limits.
0…1800 s Acceleration time.
SPEED REF RAMP
28
TLF 3 25 0 µsec (1)
< 25.01 SPEED RAMP IN
[ SPEEDREF RAMP IN ]
(6 / 3.03)
25.02 SPEED SCALING
[ 1500 rpm ]
25.03 ACC TIME
[ 1.000 s ]
25.04 DEC TIME
[ 1.000 s ]
25.05 SHAPE TIME ACC1
[ 0.000 s ]
25.06 SHAPE TIME ACC2
[ 0.000 s ]
25.07 SHAPE TIME DEC1
[ 0.000 s ]
25.08 SHAPE TIME DEC2
[ 0.000 s ]
25.09 ACC TIME JOGGING
[ 0.000 s ]
25.10 DEC TIME JOGGING
[ 0.000 s ]
25.11 EM STOP TIME
[ 1.000 s ]
25.12 SPEEDREF BAL
[ 0 rpm ]
< 25.13 SPEEDREF BAL ENA
[ FALSE ]
3.04 SPEEDREF RAMPED
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