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3. SIGNALS AND WIRING
(b) Output device
Device Symbol
Connector
pin No.
Function/Application
I/O
division
Trouble ALM CN3-15 ALM turns off when power is switched off or the protective circuit is
activated to shut off the base circuit.
Without alarm occurring, ALM turns on within about 1s after power-on.
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Electromagnetic
brake interlock
MBR CN3-13 When using this signal, set operation delay time of the electromagnetic
brake in parameter No.PC02.
In the servo-off or alarm status, MBR turns off.
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In-position
(Positioning
completed)
INP CN3-9 INP turns on when the number of droop pulses is in the preset in-position
range. The in-position range can be changed using parameter No.PA10.
When the in-position range is increased, INP may be on conductive
status during low-speed rotation.
INP turns on when servo on turns on.
This signal cannot be used in the speed loop mode.
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Ready RD When using the signal, make it usable by the setting of parameter
No.PD07 to PD09.
RD turns on when the servo is switched on and the servo amplifier is
ready to operate.
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Dynamic brake
interlock
DB When using the signal, make it usable by the setting of parameter
No.PD07 to PD09. DB turns off simultaneously when the dynamic brake
is operated. When using the external dynamic brake on the servo
amplifier of 11 kW or more, this device is required. (Refer to section
11.6.) For the servo amplifier of 7kW or less, it is not necessary to use
this device.
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Speed reached SA When using this signal, make it usable by the setting of parameter
No.PD07 to PD09.
When the servo is off, SA will be turned OFF. When servo motor rotation
speed becomes approximately setting speed, SA will be turned ON.
When the preset speed is 20r/min or less, SA always turns on. This
signal cannot be used in position loop mode.
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Limiting torque TLC When using this signal, make it usable by the setting of parameter
No.PD07 to PD09.
When torque is produced level of torque set with controller, TLC will be
turned ON. When the servo is off, TLC will be turned OFF.
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Zero speed ZSP
When using this signal, make it usable by the setting of parameter
No.PD07 to PD09.
When the servo is off, SA will be turned OFF.
ZSP turns on when the servo motor speed is zero speed (50r/min) or
less. Zero speed can be changed using parameter No.PC07.
Example
Zero speed is 50r/min
OFF
ON
0r/min
1)
3)
2)
4)
Forward
rotation
direction
Servo motor
speed
Reverse
rotation
direction
zero speed
(ZSP)
ON level
50r/min
OFF level
70r/min
ON level
50r/min
OFF level
70r/min
Parameter
No.PC07
20r/min
(Hysteresis width)
20r/min
(Hysteresis width)
Parameter
No.PC07
ZPS turns on
1)
when the servo motor is decelerated to 50r/min, and
ZPS turns off
2)
when the servo motor is accelerated to 70r/min again.
ZPS turns on
3)
when the servo motor is decelerated again to 50r/min,
and turns off
4)
when the servo motor speed has reached -70r/min.
The range from the point when the servo motor speed has reached ON
level, and ZPS turns on, to the point when it is accelerated again and has
reached OFF level is called hysteresis width.
Hysteresis width is 20r/min for the MR-J3-B servo amplifier.
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