Detailed Description Of Signals (Devices) - Mitsubishi Electric MELSERVO-J3 Series Instruction Manual

17. SPEED CONTROL OPERATION
(3) Output signal
For the output interface of each connector pin (symbols in I/O division column in the table), refer to section
4.8.2.
Signal name Symbol
Encoder A-phase LA
pulse (differential line LAR
driver)
Encoder B-phase LB
pulse (differential line LBR
driver)
Encoder Z-phase LZ
pulse (differential line LZR
driver)
(4) Power supply
Signal name Symbol
Digital I/F power DICOM
supply input
Digital I/F common DOCOM
MR-HDP01 open OPC
collector power input
Control common LG
Shield SD

17.3.2 Detailed description of signals (devices)

(1) Forward rotation start and reverse rotation start
(a) Configure a sequence so that the forward rotation start (RYn1) or the reverse rotation start (RYn2) turns
on after the main circuit is established. Each signal is invalid if it turns on before the main circuit is
established. Normally, it is interlocked with the ready signal (RD).
(b) A start in the servo amplifier is made when the forward rotation start (RYn1) or the reverse rotation start
(RYn2) turns on. The delay time of the servo amplifier's internal processing is max. 3ms. The delay time
of other devices is max. 10ms.
(c) When a programmable controller is used, the on time of the forward rotation start (RYn1) or the reverse
rotation start (RYn2) should be 6ms or longer to prevent a malfunction.
(d) During operation, neither the forward rotation start (RYn1) nor reverse rotation start (RYn2) is accepted.
Connector
Pin No.
CN6-11 Outputs pulses per servo motor revolution set in parameter No.PA15 in the
CN6-24 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 π/2.
CN6-12
The relation between rotation direction and phase difference of the A-phase and
CN6-25
B-phase pulses can be changed with parameter No.PC19.
CN6-13 The encoder zero-point signal is outputted in the differential line driver type. One
CN6-26 pulse is outputted per servo motor revolution. The signal turns on when the
zero-point position is reached. (negative logic)
The minimum pulse width is about 400 μs. For home position return using this
pulse, set the creep speed to 100 r/min or less.
Connector
Pin No.
CN6-5 Input 24VDC (24VDC±10% 150mA) for the I/O interface. The power supply
capacity varies with the number of I/O interface points to be used.
For the sink interface, connect + of the 24VDC external power supply.
CN6-17 Common terminal of input signals such as DOG and EMG of the servo amplifier.
This is separated from LG.
For the source interface, connect + of the 24VDC external power supply.
CN6-18 Not used in speed control operation.
CN6-23 Common terminal for the encoder pulses (differential line driver) (LA, LAR, LB,
LBR, LZ, LZR).
Plate Connect the external conductive portion of the shielded cable.
Functions/Applications
Functions/Applications
17 - 23
I/O
division
DO-2
DO-2
I/O
division