108
3 SIGNALS AND WIRING
3.5 Signal (device) explanations
Output signal
Power supply
Warning
WNG
When warning has occurred, WNG turns on. When a warning is not occurring, turning on the power will turn off
WNG after 2.5 s to 3.5 s.
Battery warning
BWNG
BWNG turns on when [AL. 92 Battery cable disconnection warning] or [AL. 9F Battery warning] has occurred.
When the battery warning is not occurring, turning on the power will turn off BWNG after 2.5 s to 3.5 s.
Variable gain selection
CDPS
CDPS will turn on during variable gain.
Absolute position
undetermined
ABSV
ABSV turns on when the absolute position is undetermined.
The device cannot be used in the velocity mode and torque mode.
During tough drive
MTTR
When a tough drive is enabled in [Pr. PA20], activating the instantaneous power failure tough drive will turn on
MTTR.
During fully closed loop
control
CLDS
CLDS turns on during fully closed loop control.
This is used with servo amplifiers with software version A1 or later.
Signal name
Symbol
Connector
pin No.
Function and application
Encoder A-phase pulse
(differential line driver)
LA
LAR
CN3-6
CN3-16
These devices output pulses of encoder output set in [Pr. PA15] and [Pr. PA16] in the differential line
driver type.
In CCW rotation of the servo motor, the encoder B-phase pulse lags the encoder A-phase pulse by a
phase angle of
/2.
The relation between rotation direction and phase difference of the A-phase and B-phase pulses can
be changed with [Pr. PC03].
Output pulse specification, dividing ratio setting, and electronic gear setting can be selected.
Encoder B-phase pulse
(differential line driver)
LB
LBR
CN3-7
CN3-17
Encoder Z-phase pulse
(differential line driver)
LZ
LZR
CN3-8
CN3-18
The encoder zero-point signal is output in the differential line driver type. One pulse is output per servo
motor revolution. This turns on when the zero-point position is reached. (negative logic)
The minimum pulse width is about 400
s. For home position return using this pulse, set the creep
speed to 100 r/min or less.
Analog monitor 1
MO1
CN3-4
This is used to output the data set in [Pr. PC09] to between MO1 and LG in terms of voltage.
Resolution: 10 bits or equivalent
Analog monitor 2
MO2
CN3-14
This signal outputs the data set in [Pr. PC10] to between MO2 and LG in terms of voltage.
Resolution: 10 bits or equivalent
Signal name
Symbol
Connector
pin No.
Function and application
Digital I/F power supply
input
DICOM
CN3-5
Input 24 V DC (24 V DC
10% 300 mA) for I/O interface. The power supply capacity changes
depending on the number of I/O interface points to be used.
For sink interface, c of 24 V DC external power supply.
For source interface, connect - of 24 V DC external power supply.
Digital I/F common
DOCOM
CN3-3
Common terminal of input signal such as EM2 of the servo amplifier. This is separated from LG.
For sink interface, connect - of 24 V DC external power supply.
For source interface, c of 24 V DC external power supply.
Monitor common
LG
CN3-11
Common terminal of MO1 and MO2.
Shield
SD
Plate
Connect the external conductor of the shielded wire.
Device
Symbol
Function and application
Содержание MELSERVO-J4 series
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