Fuji Electric ALPHA7, User Manual

Page: 133 / 662

CHAPTER 2 WIRING
2-86
Description of I/O Signals
2
 Parameter setting
To assign the speed coincidence [NARV] signal to a sequence output terminal, specify the
corresponding value ("25") to the output terminal function setting parameter.
 Relevant description
PA1_25 (max. rotation speed (for position and speed Control))
Specify the upper limit of the servomotor rotation speed which is specified with a parameter.
(Except for pulse input)
If the maximum rotation speed is exceeded due to an override or similar, the servomotor rotates at
the specified value.
Torque limit detection: Sequence output signal (Reference value 26)
The signal remains turned on while the output torque of the servomotor is at the torque limit value.
 Function
The torque limit value can be changed according to conditions. For details, refer to “ Torque limit 0:
Sequence input signal (Reference value 19), Torque limit 1: Sequence input signal (Reference
value 20) ” signal description.
The torque limit detection (26) output is enabled in all control modes.
 Parameter setting
To assign the torque limit detection to a sequence output terminal, specify the corresponding
value ("26") to the output terminal function setting parameter.
Overload warning detection: Sequence output signal (Reference value 27)
The signal is turned on if the servomotor load factor is at the reference value.
A warning can be issued before the servomotor is suddenly stopped due to an overload alarm or
similar.
 Function
The signal is turned on if the load factor of the servomotor reaches the overload warning level of
PA2_70 (overload warning value).
The signal is automatically turned off if the factor falls below the overload warning level. (There is
no way to reset with a sequence input signal.)
The signal can be issued before the servo amplifier trips due to an overload alarm. Determine the
reference value while referring to the characteristics diagram specified on the next page.
 Parameter setting
To assign the overload warning detection to a sequence output terminal, specify the
corresponding value ("27") to the output terminal function setting parameter.