Mitsubishi Electric GOT2000 Series Hardware User Manual page 371

GOT restoration procedure
Follow the procedure below starting from 1), and check if the GOT is restored.
Perform the action in each check item and mark the corresponding checkbox.
If the GOT is restored, take the action after restoration.
If the GOT is not restored, proceed to the next check item.
No. Check item
1) Press the GOT reset switch.
*2*3
2) Power on/off the GOT.
3) Reset or power on/off the PLC CPU.
4) Power on/off the GOT and PLC CPU
simultaneously.
5) Connect the cable again.
6) Write the package data again.
7) Install the basic software again.
8) Take the preventive measures against
noise, which is described in the
following.
Page 370 GOT installation status
check sheet
9) Replace the unit.
10) If the GOT is not restored by 1) to 9), proceed to the following.
Faulty product investigation
*1 Models other than GT23 are the targets.
The GOT reset switch does not operate when the bus connection is used.
*2 Models other than GT23 are the targets.
When using the bus connection, do not turn off and then on the GOT while the PLC power is on.
Make sure to turn off the PLC first, and turn off and then on the GOT.
*3 Models other than GT23 are the targets.
Powering off the GOT causes an error in the control station for the MELSECNET/H connection or in the master station for the CC-Link
connection (intelligent device station).
Faulty product investigation
If you cannot restore the GOT, consult your local sales office.
Depending on the problem details, we may ask you to send the faulty product to us.
In that case, attach the GOT status check sheet, GOT installation status check sheet, and system configuration check sheet
filled with details about your system.
Check
*1*3
□ Restored
□ Not restored
□ Restored
□ Not restored
□ Restored
□ Not restored
□ Restored
□ Not restored
□ Restored
□ Not restored
□ Restored
□ Not restored
□ Restored
□ Not restored
□ Restored
□ Not restored
□ Restored
□ Not restored
Cause/status
If the GOT is restored by the
operation on the left, a temporary
malfunction or others due to noise is
considered.
If the GOT is restored by the
operation on the left, the cable
connection may be faulty.
If the GOT is restored by the
operation on the left, data may have
been destroyed by an action such as
powering off the GOT during the
package data writing or basic
software installation.
A temporary malfunction or others
due to noise is considered.
If the GOT is restored by the
operation on the left, the unit may
has a hardware failure.
Action after restoration
Perform the following.
Page 370 GOT installation status
check sheet
Securely connect the cable.
If an error occurs again, proceed to the
following.
Faulty product investigation
Do not power off the GOT during data
transfer.
If an error occurs again, proceed to the
following.
Faulty product investigation
Perform the following.
Page 370 GOT installation status
check sheet
Install the failure unit to the GOT again to
check that the unit causes the
malfunction.
After the check, proceed to the following.
Faulty product investigation
12 TROUBLESHOOTING
12.1 GOT Restoration Sheets
12
369