Mitsubishi Electric RD77MS2 User Manual page 594

Error code Error name
(Hexadecimal)
1905H Hardware stroke limit
(+)
1906H Hardware stroke limit
(-)
1907H Hardware stroke limit
(-)
1908H Stop signal ON at
start
1909H Stop signal ON at
start
READY OFF  ON
190AH
during BUSY
190BH Unsupported servo
amplifier connection
1920H Start not possible
1921H Start not possible
1922H Start not possible
1923H Start not possible
1924H Start not possible
1925H Start not possible
14 TROUBLESHOOTING
592
14.5 List of Error Codes
Error details and causes
The hardware stroke limit (upper limit signal FLS) is
turned OFF during operation.
[Operation status at error occurrence]
The system stops with the setting (deceleration stop/
sudden stop) of the detailed parameter 2 Sudden stop
selection (stop group 1).
(Note that the deceleration stop only occurs during the
manual pulse generator operation.)
Start is requested when the hardware stroke limit (lower
limit signal RLS) is turned OFF.
[Operation status at error occurrence]
The system does not start.
The hardware stroke limit (lower limit signal RLS) is
turned OFF during operation.
[Operation status at error occurrence]
The system stops with the setting (deceleration stop/
sudden stop) of the detailed parameter 2 Sudden stop
selection (stop group 1).
(Note that the deceleration stop only occurs during the
manual pulse generator operation.)
Start is requested when a stop signal is turned ON.
[Operation status at error occurrence]
The system does not start.
Start is requested when an external stop is turned ON.
[Operation status at error occurrence]
The system does not start.
The PLC READY signal is turned from OFF to ON when
BUSY signal is turned ON.
[Operation status at error occurrence]
The READY signal [X0] is not turned ON.
A servo amplifier/driver which is not supported is
connected.
[Operation status at error occurrence]
The target axis is not connected to the servo amplifier.
Start is requested when start is not possible in the axis
operation state.
[Operation status at error occurrence]
The system does not start positioning.
Start is requested when the "[Md.26] Axis operation
status" is "-1: Error".
[Operation status at error occurrence]
The system does not start positioning.
Start is requested when the "[Md.26] Axis operation
status" is "20: Servo amplifier has not been connected/
servo amplifier power OFF".
[Operation status at error occurrence]
The system does not start positioning.
Start is requested when the "[Md.26] Axis operation
status" is "21: Servo OFF".
[Operation status at error occurrence]
The system does not start positioning.
Start is requested when communication with servo
amplifier is error.
[Operation status at error occurrence]
The system does not start positioning.
Start is requested when the "[Md.26] Axis operation
status" in the axis to be interpolated is "-1: Error", "20:
Servo amplifier has not been connected/servo amplifier
power OFF", and "21: Servo OFF".
[Operation status at error occurrence]
The system does not start positioning.
Remedy
After making an axis error reset, perform manual
control operation to move the axis to the other position
in order that the upper limit signal (FLS) will not turn
OFF.
• Check the wiring of lower limit signal RLS.
• Check if the specification of the limit switch and the
setting of the "[Pr.22] Input signal logic selection"
match.
• If hardware stroke limit (limit switch) is unnecessary
system for installation, wire to always turn ON the
lower limit signal (RLS) input of the Simple Motion
module.
After making an axis error reset, perform manual
control operation to move the axis to the other position
in order that the lower limit signal (RLS) will not turn
OFF.
After clearing the stop command status, then review
the timing of start.
After clearing the external stop signal, then review the
timing of start.
Turn ON the PLC READY signal [Y0] with the BUSY
signals of all axes OFF.
Connect supported servo amplifier/driver.
Do not request the start when the axis operation state
is other than "0: Standby", "1: Stopped", and "-2: Step
standby".
Do not request the start when the axis operation state
is other than "0: Standby", "1: Stopped", and "-2: Step
standby".
Do not request the start when the axis operation state
is other than "0: Standby", "1: Stopped", and "-2: Step
standby".
Do not request the start when the axis operation state
is other than "0: Standby", "1: Stopped", and "-2: Step
standby".
Check the wiring with the servo amplifier and
connection of connectors.
Do not request the start when the "[Md.26] Axis
operation status" in the axis to be interpolated is other
than "0: Standby", "1: Stopped", and "-2: Step standby".