Mitsubishi MELDAS MDS-C1

6. Troubleshooting
6 - 37
Alarm No.
7F
Power reboot request
A mismatch in the program mode selection was detected. Turn the drive unit power ON again.
Investigation details Investigation results Remedies SV SP
1 Were the parameter settings
changed?
SV009, SV010, SV011, SV012
SV033, bit8, 9
This alarm is detected if the high-gain
specification parameters are set
when the drive unit is started up with
the standard specification software
mode, or if the standard specification
parameters are set when started up
with the high-gain specifications.
Turn the drive unit's control power
ON again.
{
Alarm No.
88
Watch dog
The system is not operating normally.
Investigation details Investigation results Remedies SV SP
The version was changed. Replace with a drive unit containing
the original software version.
1 Check whether the servo software
version was changed recently.
The version was not changed. Investigate item 2.
{ {
The alarm is always repeated. Replace the drive unit. 2 Check the repeatability.
The state is returned to normal once,
but then the alarm occurs
occasionally.
Investigate item 3.
{ {
No abnormality is found in particular. Replace the drive unit. 3 Check if there is any abnormality in
the unit's ambient environment.
(Ex. Ambient temperature, noise,
grounding)
An abnormality was found in the
ambient environment.
Take remedies according to the
causes of the abnormality.
Ex. High temperature:
Check the cooling fan.
Incomplete grounding:
Additionally ground.
{ {
Alarm No.
89
Encoder converter unit 2, connection error
With the servo, an error was detected in the connection with the analog output linear scale for the
MDS-B-HR unit. With the spindle, initial communication with the MDS-B-PJEX was not possible.
Investigation details Investigation results Remedies SV SP
The connector is disconnected (or
loose).
Correctly install. 1 Wiggle the MDS-B-HR/MDS-B-PJEX
unit connector (CON3) by hand to
check whether it is disconnected.
The connector is not disconnected. Servo
: Investigate item 2.
Spindle
: Investigate item 4.
{ {
The cable is broken. Replace the cable. 2 Check whether the cable between
the linear scale and MDS-B-HR is
broken.
The cable is not broken. Investigate item 3.
{
No abnormality is found in particular. Replace the MDS-B-HR unit. 3 Check if there is any abnormality in
the unit's ambient environment.
(Ex. Ambient temperature, noise,
grounding)
An abnormality was found in the
ambient environment.
Take remedies according to the
causes of the abnormality.
Ex. High temperature:
Check the cooling fan.
Incomplete grounding:
Additionally ground.
{
The cable is broken. Replace the cable. 4 Check whether the cable between
the spindle drive unit and
MDS-B-PJEX is broken.
The cable is not broken. Investigate item 5.
{
No abnormality is found in particular. Replace the drive unit. 5 Check if there is any abnormality in
the unit's ambient environment.
(Ex. Ambient temperature, noise,
grounding)
An abnormality was found in the
ambient environment.
Take remedies according to the
causes of the abnormality.
Ex. High temperature:
Check the cooling fan.
Incomplete grounding:
Additionally ground.
{
Alarm No.
8A
Detection converter unit 2, communication error
With the servo, an error was detected in the communication with the serial output linear scale for the
MDS-B-HR unit. With the spindle, an error was detected in the communication with the MDS-B-PJEX.
Investigation details Investigation results Remedies SV SP
1 Check the alarm No. "89" items.
{ {