MITSUBISHI ELECTRIC QJ71C24N - Manual (Page 276)

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MELSEC-Q
10 TROUBLESHOOTING
10.2.3 Error code list while modem function is used
The following describes the error codes, contents and corrective actions for errors
(including errors at the abnormal completion) that may occur while the Q series C24
modem function is used.
The error codes for the modem function are stored in the modem function error code
storage area (address : 221 H (545)) of the buffer memory.
The reference pages listed in the table below are found in the User's Manual
(Application).
Error code
(Hexa-
decimal)
Error Error Contents
Signal
name
Corrective action Reference section
7FD0
H
There is an error in the designation of the notification
execution.
Set 0 to 1 to the notification execution
designation.
7FD1 H
There is an error in the designation of the number of
connection retries.
Set the number of connection retries in
the range of 1 to 5.
7FD2 H
There is an error in the designation of the connection
retry interval.
Set the connection retry interval in the
range of 90 to 300 (s).
7FD3 H
There is an error in the initialization/connection time-
out designation.
Set the initialization/connection time- out
in the range of 1 to 60 (s).
7FD4
H
There is an error in the designation of the number of
initialization retries.
Set the number of initialization retries in
the range of 1 to 5.
Section 3.3.6
7FD5 H
There is an error in the designation of the data
number for initialization.
Designate the registered data number for
initialization, or 0.
Section 3.3.6
Section 3.4.5
7FD6 H Recheck the pager receiver designation.
7FD7
H
Modern
function
error
There is an error in the data for connection designated
by the data number for connection.
CHn
ERR.
Recheck the dialing number of the
external line.
Section 3.4.4
7FD8
H
System error The OS of the Q series C24 detected some error.  ( 1) 
7FD9 H
External destination is connected to network or
modem has not been initialized.
After the modem has been initialized,
connect to the network if the external
destination is not connected to the
network or report it.
Section 3.4.6
Section 3.4.7
7FDA H
There is an error in the designation of the data number
for connection.
Designate a registered number for the
data for connection.
Section 3.3.6
Section 3.4.6
7FDB
H
There is an error in the designation of the GX
Developer connection.
Set 0 to 1 to the GX Developer
connection designation.
Section 3.3.6
7FDC
H
There is an error in the data for connection designated
by the data number for connection.
Recheck the waiting time for the
notification-message part of the message
transmission.
Section 3.4.4
7FDD H A connection time-out error occurred.
•
Recheck the telephone number in the
data for connection.
• Check if the destination is ready for a
connection.
• Recheck the set value of the
connection time-out.
• Recheck the initialization command.
Section 3.3.6
Section 3.4.3
Section 3.4.4
7FDE
H
Connection to the modem/TA was unsuccessful, or
the modem/TA is not connected.
CHn
ERR.
• Check if there is any problem with the
modem/TA by seeing the operation
manual of the modem/TA.
• Connect the modem/TA to the Q series
C24.
• Check the connection cable by seeing
the operation manual of the
modem/TA.
—
7FDF H Modem connection channel number is not designated.
7FE0 H
Modern
function
error
Designated value of modem connection channel is
incorrect.

Set 1 to 2 to the modem connection
channel designation.
Section 3.3.6