Mitsubishi Electric MELDAS C6 Instruction Manual page 214

(2) Error display
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2. Screen Operation of A985GOT
EMG EMERGENCY ****
Error
items
PLC The user PLC has entered the
emergency stop state during the
sequence process.
EXIN The emergency stop input signal is
significant (open).
SRV An alarm occurred in the servo
system causing an emergency stop.
STOP The user PLC (ladder sequence) is
not running.
SPIN Spindle drive unit not mounted.
The spindle drive unit is not mounted.
PC_H High-speed PC processing abnormal • Check the sequence program.
PARA Setting of the door open II fixed
device is illegal.
The dog signal random assignment
parameter setting is illegal.
XTEN External PLC H/W is not found.
The external PLC card is not
mounted.
WAIT External PLC is not ready.
The External PLC Ready signal is
not turned ON.
LINK External PLC communication error
occurred.
A communication error occurred
between the external PLC and NC.
LAD The user PLC (ladder sequence) has
an illegal code.
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2.7 Diagnosis
Error items
Details
• Investigate and remove the cause of
• Cancel the emergency stop input signal.
• Check the wiring to see if any wiring is
• Investigate and remove the cause of
• Check if the rotary switch CS1 (left
• Check if the PLC edit file save screen
• Cancel the causes of the other
• Check emergency stop signal and
• Specify the #1155 DOOR_m and #1156
• Correctly set the #2073 zrn_dog, #2074
• Check that the external PLC card is
• Change the external PLC card.
• Reset and start the external PLC.
• Turn the NC power OFF and then ON.
• Check that the external PLC card is
• Change the external PLC card.
• Change the NC card.
• Check the user PLC (ladder sequence)
I - 199
Cause
the user PLC emergency stop.
missing.
the servo alarm.
switch) on the top of the controller front
panel is set to 1.
(onboard function) [4RUN/SP] (run/stop)
switch is turned ON.
emergency stop.
ready signal input in the spindle
amplifier.
(To stop monitoring the high-speed PC
processing temporarily, set "1" in #1219
aux03 bit1. Disable the monitoring
function only as a temporary measure.)
DOOR_s parameters correctly. (When
the door open II fixed device is not used,
set #1155 DOOR_m and #1156
DOOR_s to "100".)
h/w_ot+, #2075 h/w_ot- and #1226
aux10 bit 5 parameters.
mounted.
mounted.
to see if it uses illegal device numbers
or constants.