Communication Is Not Available Via The Modem; Communication Is Not Available With The Isdn Sub-Address - Mitsubishi Melsec-L Series User Manual

15.3.16 Communication is not available via the modem

Symptom
• A modem initialization error occurs.
• Modem connection channel designation
• Auto modem initialization
cannot be executed.
• There is an error in the switch settings in
• Communication protocol setting is
• Data cannot be
communicated with GX
• Transmission setting does not match the
Works2 supporting the
C24.
• Communication rate does not match the
• The product is not supported by GX
• The GX Works2 does not
• There was an error in the GX Works2
receive the callback
signals from the C24.
• There is an error in the GX Works2
• There s an error in the GX Works2
• Callback connections
from GX Works2 are
refused by the C24.
• There is an error in the connection
• There is an error in the C24 setting
• When performing Auto
(callback: during fixed/
• There is an error in the GX Works2
during designated
number) from GX
Works2, connection to
• There is an error in the telephone No. of
the C24 is refused.
• It is possible to connect • The timer value for the status of the
from GX Works2, but
callback from C24 cannot
be performed.
• There is a problem with the modem

15.3.17 Communication is not available with the ISDN sub-address

Symptom
• Sub-address is incorrect.
• Data cannot be
• Modem does not support ISDN sub-
communicated with ISDN
sub-address
• Sub-address is incorrectly partitioned.
15 - 52
Cause
is not performed.
GX Works2.
incorrect.
external device.
external device.
Works2.
connection system.
side's modem settings.
connection system.
system's telephone No.
value.
connection system.
the connection system.
modem used or the line is short.
specifications or settings.
Cause
address.
Corrective action
• Check the error code and execute
processing accordingly.
• Set Modem connection channel
designation.
• Review the switch settings. Set it to
match the local station modem and the
TA.
• Set the communication protocol to MC
protocol, Format 5.
• Review the transmission setting.
• Review the communication rate setting.
• Confirm the GX Works2 S/W version.
• Check the GX Works2 connection
system.
• Set the connection system on "callback
reception waiting" and connect.
• Set the modem's settings on "Auto
Reception."
• Check the GX Works2 connection
system.
• Correct the C24's settings.
• Check the telephone No.
• Change the telephone No. to the data
for callback.
• Set the callback function designation on
the setting 1 to 3.
• Check the GX Works2 connection
system.
• Check the C24's settings.
• Check the telephone No.
• Change the telephone No. to the data
for callback.
• Adjust each of the timer values for the
callback function on the GX Works2
side. (Line callback cancel wait time,
callback delay time)
• Check the modem's specifications and
settings.
Corrective action
• Review the sub-address.
• Use modem that supports ISDN sub-
address.
• Review how to partition the sub-address
using the TA manual.
15 TROUBLESHOOTING
Non-
Bidirectional
MC procedural Predefined
protocol
protocol
Non-
Bidirectional
MC procedural
protocol
protocol
15 - 52
Pre-
defined