Mitsubishi Electric MELSEC Q Series Programming Manual page 521

APPENDICES
Table 1.10 Absolute position system error (1200 to 1299) list
Control mode
Error
code
1201
1202
(3) Absolute position system errors (1200 to 1299)
These errors are detected at the absolute position system.
The error codes, causes, processing and corrective actions are shown in Table
1.10.
Error cause
• The error causes why the
home position return is
required in the absolute
position system are as
follows:
(1) The home position return
has never been executed
after the system start.
(2) The home position return
is started, but not
completed correctly.
(3) Absolute data in the
Motion CPU is erased
due to causes such as a
battery error.
(4) Servo error [2025],
[2143], or [2913]
occurred.
(5) Major error [1202], [1203]
or [1204] occurred.
(6) "Rotation direction
selection" of the servo
parameter is changed.
• A communication error
between the servo amplifier
and encoder occurred at the
turning on servo amplifier
power supply.
APP - 30
Error
Corrective action
processing
• Execute the home position
return after checking the
batteries of the Motion CPU
module and servo amplifier.
Home
position
return
request ON
Depending • Check the motor and encoder
on the cables.
version of • If the home position return
operating request signal is turning ON,
system execute a home position
software and return.
servo
amplifier,
home
position
return
request ON,
servo error
[2016] set.
(Fully closed
loop control
servo
amplifier use:
Servo error
[2070] is
set.)