Mitsubishi Electric Melservo-J3 Series MR-J3-B, Instruction Manual

Page: 693 / 802

17 - 8
17. SPEED CONTROL OPERATION
Signal name
(Device name)
Description
Device No.
Remarks 1 station
occupied
2 stations
occupied
Internal torque limit
selection When RY(n+2)6 is turned off, parameter No.PA11 (forward rotation
torque limit) and parameter No.PA12 (reverse rotation torque limit) will
be valid and when it is turned on, the torque limit value of parameter
No.PC35 (internal torque limit) will be valid. (Refer to section 4.6.3) RY(n+2)6
Proportional control When RY(n+2)7 is turned on, the speed amplifier is switched from the
proportional integral type to the proportional type.
If the servo motor at a stop is rotated even one pulse due to any
external factor, it generates torque to compensate for a position shift.
When the servo motor shaft is to be locked mechanically after stop,
switching on the proportion control (RY(n+2)7) upon stop will control
the unnecessary torque generated to compensate for a position shift.
When the shaft is to be locked for an extended period of time, turn
internal torque limit selection (RY(n+2)6) on simultaneously with
proportion control (RY(n+2)7) to keep the torque not exceed the rated
torque using internal torque limit (parameter No.PC35). RY(n+2)7 *2
Gain switching When RY(n+2)8 is turned on, the load to motor inertia ratio and the
corresponding gain values change to the values of parameter No.PB29
to PB32. To change the gain using RY(n+2)8, disable the auto tuning. RY(n+2)8
Speed specifying method
selection Select how to give a speed command. (Refer to section 3.6.3.)
Off: Specifying speed command by RY of CC-Link
Give a speed command by specifying the point table No. with
selection 1 to 3 (RYnA to RYnC).
On: Specifying speed command by remote register
Give a speed command by setting the instruction code with
remote register (RW
wn
+6).
Set parameter No.PC30 (remote register-based speed specifying
method selection) to " 0
" (specify speed selection No.) or
" 1 (specify the servo motor speed).
RY(n+2)A
Reset Keeping RY(n+1)A or RY(n+3)A on for 50ms or longer allows an alarm
to be deactivated.
Some alarms cannot be deactivated by Reset RY(n+1)A or RY(n+3)A.
(Refer to section 17.9.4.)
If RY(n+1)A or RY(n+3)A is turned on with no alarm occurring, the base
circuit will not be shut off. Parameter No.PD20 (function selection D-1)
is set to "
□□
0
□
", the base circuit will be shut off.
This device is not designed to make a stop. Do not turn it on during
operation.
RY(n+1)A RY(n+3)A