Mitsubishi Electric MELSEC iQ-R Series User Manual page 489

Error code Error
(hexadecima
l)
7FDEH Modem function
error
7FDFH Modem function
error
7FE0H Modem function
error
7FE1H Modem function
error
7FE2H Modem function
error
7FE3H Modem function
error
7FE4H Modern function
error
7FE5H Modem function
error
7FE6H Remote password
error
Description Signal
name
• Connection to the modem/ CHn
TA failed, or a modem/TA ERR.
is not connected.
• The modem connection CHn
channel No. has not been ERR.
set.

• The designated value for
modem connection
channel is incorrect.
• The user frame No. CHn
designation is incorrect. ERR.
• The output start pointer
designation is incorrect.
• The output frame No. CHn
designation is incorrect. ERR.
• The registration data byte CHn
count designation is ERR.
incorrect.
• The data for connection of CHn
the number specified in ERR.
the data No. for
connection designation is
incorrect.
• The no-communication CHn
interval time designation ERR.
is incorrect.
• Remote passwords do not 
match.
Corrective action Protocol
MC
• Check if the modem/TA has 
any failure by referring to the
instruction manual for the
modem/TA.
• Connect the modem/TA to
C24.
• Check the connection cable
by referring to the instruction
manual for the modem/TA.
• Check for any abnormality
according to the following
procedure.
(Page 490 Corrective
actions for system error)
• Set the modem connection 
CH specification to 1 or 2.

• Set the modem connection
CH specification to 1 or 2.
• Review the user frame No. 
• Designate the registered user
frame No.
• Register the designated data
for initialization.
• Set the output start pointer
designation to 1 to 100.
• Designate the position (n-th)
to which the number of data
for initialization is designated.
• Designate the number of data
for initialization to the
designated position (n-th).

• Designate the registered
number of data for
initialization to the range of the
designated output quantity
starting from the position of
the output start pointer
designation.

• Set the data for initialization to
1 to 78.
• Set the data for connection to
80.
• Review the data for 
connection.

• Set the no-communication
interval time designation to 0
to 120.
• Review the remote password 
and restart data
communications.
Nonpr Bidire Prede
ocedu ctiona fined
ral l
 
 
 
 
 
 
 
 
27 TROUBLESHOOTING
487
27.4 Error Code List
27