Mitsubishi Electric FR-V500 Series Instruction Manual page 42

(1) I/O signals
The following table indicates the operations of the signals.
Signal
External operation
Start signal
PU operation
Torque command As set in the torque command source selection parameter. Input torque command.
Speed limit As set in the speed limit selection parameter.
(2) Operation example (Pr. 804 = 0)
Torque control is enabled if the actual speed is less than the speed limit value.
When the actual speed reaches or exceeds the speed limit value, speed limit operation starts, torque control is
stopped, and speed control (proportional control) starts.
The following shows the operations in response to the analog input command from the terminal 3.
STF
(Forward rotation
command)
RH
(Speed limit)
1) When STF is turned on, the speed limit value is increased according to the time set in Pr. 7.
2) Torque control operation is performed when the actual speed is less than the speed limit value.
3) When the STF start signal is turned off, the speed limit value is decreased according to the time set in Pr. 8.
4) For torque control, the actual speed becomes constant when the torque command and load torque are
balanced.
5) The motor torque developing direction is determined by the combination of the torque command input polarity
and start signal as indicated in the following table.
Torque Command Polarity
Positive torque command
Negative torque command
REMARKS
When speed limit operation starts, speed control is exercised to enable internal torque limit (Pr. 22 "torque limit level) (factory
setting). Speed control may not be returned to torque control in this case. Torque limit be set to external torque limit (terminals
3, 1 and 6 (option FR-V5AX)).
(Refer to Pr. 803 "constant power range torque characteristic selection" (page 34).)
Terminal Name
STF, STR signal
Forward or reverse rotation from
PU04V or DU04
-1
Speed limit value
Pr. 7
Torque control operation
Speed limit
operation
Torque Developing Direction (Mode)
STF signal ON
Forward rotation direction (forward rotation
driving/reverse rotation regeneration)
Reverse rotation direction (forward rotation
regeneration/reverse rotation driving)
39
Torque control operation
Remarks
Start and stop are the same as under speed
control. A stop is made when the STF and
STR signals are both on.
Display SL and output OL signal during speed
limit.
Pr. 8
Speed limit Torque Speed limit
operation control operation
(Speed control) operation
STR signal ON
Reverse rotation direction (forward rotation
regeneration/reverse rotation driving)
Forward rotation direction (forward rotation
driving/reverse rotation regeneration)
4