5-11
rameter Cn-01, bit no. 0, this signal can be bypassed. In that case, the servo will be turned on after the
power is turned on.
D
Gain Reduction (15: MING)
Input this signal to lower the loop gain for the control loop, and to weaken servo rigidity (repellant force
with respect to external force). When the gain reduction signal is input, speed loop integration is dis-
abled. As a result, the speed loop gain will drop.
In addition, when parts are inserted after positioning, the insertion operation is made easier because the
repellant force with respect to external force is weakened by the inputting of this signal. This cannot be
used for the vertical shaft where a gravity load is applied, because position deviation will occur.
D
Forward Drive Prohibit (16: POT, Cn-01 bit No. 2 = 0)
Reverse Drive Prohibit (17: NOT, Cn-01 bit No. 3 = 0)
These two signals are the inputs for forward and reverse drive prohibit (overtravel). When they are in-
put, driving is possible in the respective directions. When driving is prohibited, movement will stop ac-
cording to the setting of bit no. 8 of setup parameter no. 1 (Cn-01). Alarm status will not be generated at
the Driver. When drive prohibition is not used, clear the function by connecting the respective signal to
the external power 24-V GND or setting setup parameter Cn-01, bit nos. 2, 3 = 1,1.
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Stopping Methods when Forward/Reverse Drive Prohibit is OFF
Bit
No. 8
0
1
POT (NOT) is OFF
Deceleration Method
Decelerate by dynamic brake.
Decelerate by the maximum
torque
Servo free (dynamic brake OFF)
Stopped Status
Servo lock
Note The position loop is not valid when stopping with this mode.
D
Alarm Reset (18: RESET)
This is the external reset signal input for the servo alarm. The alarm is reset when the signal turns ON.
Remove the cause of the alarm and then restart operation. In order to prevent danger, turn OFF the run
command before inputting the reset signal.
D
Command Pulse Inputs and Deviation Counter Reset Inputs
The input circuits for command pulse and deviation counter reset inputs are shown in the following dia-
gram.
Line-driver Input
Controller side
Servo Driver side
Applicable line driver
AM26LS31A or equivalent
220
Ω
+
–
+
–
Specifications
Chapter 5
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