IS620P User Manual                                                                                            Chapter 6 Troubleshooting
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Cause Conrming Method Corrective Action
1.The electronic gear 
ratio setting exceeds the 
preceding limit.
 
•
If H05-02 = 0, check the ratios of H05-
07/H05-09 and H05-11/H05-13
 
•
If H05-02 > 0, check the ratios of 
encoder resolution/H05-02, H05-07/
H05-09 and H05-11/H05-13.
The ratios of encoder 
resolution /H05-02,  
H05-07/H05-09, and H05-11/
H05-13 must be within the 
preceding limit.
2. The parameter 
modifying sequence is 
unreasonable.
 
•
When modifying the electronic gear 
ration related parameters H05-02, 
H05-07/H05-09, and H05-11/H05-13, 
the modifying sequence unreasonable, 
which resulting in electronic gear ratio 
exceeding the limit during calculation 
of the electronic gear ratio.
Adjust the gain manually 
or perform automatic gain 
adjustment according to 
section 4.5.2.
38. Er.D03: CAN communication interrupted
Cause: 
 
•
CAN communication times out.
Cause Conrming Method Corrective Action
1. CAN communication 
interrupted: The slave 
station becomes ofine.
 
•
Check the CAN communication card 
indicator state of the master PLC. 
The ERR indicator of the master PLC 
ashes at the frequency of 1 Hz and 
the ERR indicator of some slave PLCs 
keeps ON for long time.
(When using the PLC background 
software, you can monitor D78xx in 
the component monitoring table of the 
master. xx indicates the station No. in 
decimal. If the corresponding D78xx 
of some congured stations is 5, it 
indicates that a fault occurs on the 
slave PLC.)
Check the communication 
cable connection between the 
slaves with ERR indicator ON 
for long time and the master.
Check the communication 
baud rate (H0C-08) of the 
slaves with ERR indicator ON 
for long time and adjust the 
baud rate the same as that of 
the master.
2. CAN communication 
interrupted: The master 
station becomes ofine.
 
•
Check the CAN communication card 
indicator state of the master PLC.
 
•
The ERR indicator of all slave PLCs 
keeps ON for long time.
 
•
(When using the PLC background 
software, you can monitor D78xx in 
the component monitoring table of the 
master. xx indicates the station No. in 
decimal. If the corresponding D78xx of 
all congured stations is 5, it indicates 
that a fault occurs on the master PLC.)
Check the cable connection 
of the master PLC.