Mitsubishi Electric MELFA CR800-D Series - Troubleshooting; List of Errors; An E7730 Error Has Occurred and CC-Link Does Not Establish a Link

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8. Troubleshooting
Please read this chapter first if you suspect that some failure has occurred.
8.1. List of Errors
Table 8.1-1 List of Errors
Error
No.
Error message Cause Action
7700
CC-Link card is illegal (Error
Code).
CC-Link card is illegal.
Please exchange the CC-Link
card.
7710
Cannot set a CC-Link master
station.
A master station is already
set by the rotary switch.
Set the rotary switch to other
than 0.
7720
Two CC-Link interface cards
are mounted.
Mount one card in slot 2.
It is not allowed to install two
cards. Install only one card.
7730
CC-Link data link error (local
station connection error)
There is a line error or the
master station's parameter
settings are invalid.
Review the line and
parameters (see Section 8.2).
7750
A (CC-Link) cable is not
connected or parameters do
not match.
A cable is not connected or
parameters do not match.
Reset the power and start
again.
7760 CC-Link initialization error
The master station's
parameters do not match.
Correct the parameters, and
then start again.
7780
A CC-Link register number is
outside the range.
A register number entered
is outside the allowable
range.
Enter the correct value.
7781
A signal number for CC-Link
was specified.
A signal number for
CC-Link was specified.
Install a CC-Link interface
card.
*Refer to "the cc-Link system master local unit user's manual (volume on details)" for the details of the CC-Link
error code.
Refer to 8.3 When 7760 errors (abnormalities in cc-Link initialization) occur for the error which is not indicated
to the error code of the above-mentioned manual.
8.2. An E7730 Error Has Occurred and CC-Link does not Establish a Link
Please confirm the next item, when you cannot solve, even if measures.
1) Are the setup of rotary switch (MODE) on the CC-Link master-station unit and the setup of the
parameter "CCSPD" in agreement?
2) Is the terminator connected?
3) Is the CC-Link communication cable equipped with the ferrite core at the place of many noises?
4) The check of the status confirmation by LED, the short circuit of the CC-Link unit by the tester, etc. is
possible. Please refer to "open field network CC-Link troubleshooting guidance" for the check method.