Mitsubishi Electric MELSERVO-J4 Series Transition Handbook page 83

Part 2: Review on Replacement of MR-J3-_A_ with MR-J4-_A_
MR-J3-_A_
No.
Name and function
PC20
Station number setting
Used to specify the station number for serial
communication.
Always set one station to one axis of servo amplifier.
If one station number is set to two or more stations,
normal communication cannot be made.
PC21 Communication function selection
Select the communication I/F and select the RS-422
communication conditions.
0 0 x 0:
RS-422 communication baud rate selection
0: 9600 [bps]
1: 19200 [bps]
2: 38400 [bps]
3: 57600 [bps]
4: 115200 [bps]
0 x 0 0:
RS-422 communication response delay time
0: Invalid
1: Valid, reply sent after delay time of 800 μs or
longer
PC22 Function selection C-1
Select the execution of automatic restart after
instantaneous power failure selection, and encoder
cable communication system selection.
0 0 0 x:
Restart after instantaneous power failure selection
If the power supply voltage has returned to normal
after an undervoltage status caused by the
reduction of the input power supply voltage in the
speed control mode, the servo motor can be
restarted by merely turning on the start signal
without resetting the alarm.
0: Invalid ([AL.10 Undervoltage alarm] occurs.)
1: Valid (If this function is enabled for the drive unit
of 30 kW or more, [AL. 37 Parameter error]
occurs.)
x 0 0 0:
Encoder cable communication system selection
0: Two-wire type
1: Four-wire type
The following encoder cables are four-wire type.
MR-EKCBL30M-L
MR-EKCBL30M-H
MR-EKCBL40M-H
MR-EKCBL50M-H
Other encoder cables are two-wire type.
Incorrect setting will result in [AL.16 Encoder error 1
(At power on)].
Initial
No.
value
0 PC20
Same setting as MR-J3
Station No. setting
Specify a station number of the servo amplifier for
RS-422 and USB communications.
Always set one station to one axis of the servo
amplifier. Setting one station number to two or more
stations will disable a normal communication.
Setting range: 0 to 31
0000h PC21 RS-422 communication function selection
Select the communication I/F and select the RS-422
communication conditions.
_ _ _ x:
For manufacturer setting
_ _ x _:
RS-422 communication baud rate selection
When using the parameter unit, set "1 _ _ _" in [Pr.
PF34].
0: 9600 [bps]
1: 19200 [bps]
2: 38400 [bps]
3: 57600 [bps]
4: 115200 [bps]
_ x _ _:
RS-422 communication response delay time
selection
0: Disabled
1: Enabled (responding after 800 μs or longer delay
time)
x _ _ _:
For manufacturer setting
0000h PC22 _ _ _ x:
For manufacturer setting
_ _ x _:
For manufacturer setting
_ x _ _:
For manufacturer setting
Function selection C-1
x _ _ _:
Encoder cable communication method selection
Select how to execute the encoder cable
communication method.
0: Two-wire type
1: Four-wire type
When using an encoder of A/B/Z-phase differential
output method, set "0".
If the setting is incorrect, [AL. 16 Encoder initial
communication error 1] or [AL. 20 Encoder normal
communication error 1] occurs.
2 - 48
MR-J4-_A_
Name and function
Control
Initial
mode
value
0 P
S
T
0h
0h P
S
T
0h P
S
T
0h
0h
0h
0h
0h P
S
T