Mitsubishi FR-A740-00023-EC Instruction Manual page 380

Special operation and frequency control
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
f1
f0
f1
Output frequency(Hz)
Clamped by Pr.1
Pr.1
f0
Pr.2
Output frequency(Hz)
S-pattern acceleration
f0
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)
370
· If the set frequency (f0) and traverse operation parameters (Pr. 598 to
at this point
f1
f0
f1
Time(s)
· When the output frequency exceeds Pr. 1 Maximum frequency or Pr. 2
f1
f1
Clamped by Pr.2
Time(s)
S-pattern
deceleration
· When the traverse function and S-pattern acceleration/deceleration
f1
f1
Time(s)
· When stall prevention is activated during traverse operation, traverse
Time(s)
Refer to page 151
Refer to page 167
Refer to page 170
Refer to page 222
Pr. 597) are changed, pattern operation is performed at changed f0
after the output frequency reached f0 before change.
Minimum frequency, the output frequency is clamped at maximum/
minimum frequency while the set pattern exceeds the maximum/
minimum frequency.
(Pr. 29 ≠ 0) are selected, S-pattern acceleration/deceleration is
performed only in the areas where operation is performed in normal
Acceleration and deceleration time (Pr. 7, Pr. 8). For acceleration/
deceleration during traverse operation, linear acceleration/
deceleration is made.
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.