Mitsubishi Electric FR-F740-00023 Instruction Manual page 256

REMARKS
When the second function signal (RT) is on, normal acceleration/deceleration time (Pr. 7, Pr. 8) is the same as second
acceleration/deceleration time (Pr. 44, Pr. 45).
Output frequency(Hz)
F0 is rewritten at this point.
Reflected on the action
at this point
f1
f0
f1
Output frequency(Hz)
Clamped by Pr.1
Pr.1
f0
Pr.2
Clamped by Pr.2
Output frequency(Hz)
S-pattern acceleration
f0
f1
STF(STR)
ON
signal
RH signal
ON
Output frequency(Hz)
Stall prevention operation
f1
f0
Decelerate as
f1
set in Pr. 8
Accelerate as set in Pr. 7
Stall prevention operation
CAUTION
· When the value of amplitude inversion compensation amount (Pr. 594, Pr. 595) is too large, pattern operation as set is not
performed due to overvoltage shut-off and stall prevention.
· Changing the terminal assignment using Pr. 178 to Pr. 189 (input terminal function selection) may affect the other functions.
Please make setting after confirming the function of each terminal.
Parameters referred to
Pr. 1 Maximum frequency, Pr. 2 Minimum frequency
Pr. 7 Acceleration time, Pr. 8 Deceleration time
Pr. 29 Acceleration/deceleration pattern selection
Pr.178 to Pr.189 (input terminal function selection)
· If the set frequency (f0) and traverse operation parameters (Pr. 598 to
Pr. 597) are changed, pattern operation is performed at changed f0
f1 after the output frequency reached f0 before change.
f0
f1
Time(s)
· When the output frequency exceeds Pr. 1 Maximum frequency or Pr.2
Minimum frequency, the output frequency is clamped at maximum/
f1
minimum frequency while the set pattern exceeds the maximum/
minimum frequency.
f1
Time(s)
S-pattern
deceleration
· When the traverse function and S-pattern acceleration/deceleration
(Pr. 29
performed only in the areas where operation is performed in normal
f1
Acceleration and deceleration time (Pr. 7, Pr. 8). For acceleration/
deceleration during traverse operation, linear acceleration/
deceleration is made.
Time(s)
· When stall prevention is activated during traverse operation, traverse
operation is stopped and normal operation is performed. When stall
prevention operation ends, the motor accelerates/decelerates to f0 in
normal acceleration/deceleration time (Pr. 7, Pr. 8). After the output
frequency reaches f0, traverse operation is again performed.
Time(s)
Refer to page 76
Refer to page 90
Refer to page 93
Refer to page 110
Special operation and frequency control
0) are selected, S-pattern acceleration/deceleration is
4
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