Mitsubishi QJ71C24N - Communication Is Not Available with the ISDN Sub-Address; Periodic Transmission Is Not Performed Normally; Condition Agreement Transmission Is Not Performed Normally; Data Cannot be Received Due to an Interrupt Program

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MELSEC-Q
11 TROUBLESHOOTING
11.3.17 Communication is not available with the ISDN sub-address.
Symptom Cause Corrective action MC
Non
procedure
protocol
Bidirectional
protocol
Pre-
defined
• Sub-address is incorrect. • Review the sub-address.
• Modem does not support ISDN sub-
address.
• Use modem that supports ISDN sub-
address.
• Data cannot be
communicated with ISDN
sub-address
• Sub-address is incorrectly partitioned. • Review how to partition the sub-address
using the TA manual.
11.3.18 Periodic transmission is not performed normally.
Symptom Cause Corrective action MC
Non
procedure
protocol
Bidirectional
protocol
Pre-
defined
• The setting value of the constant cycle
transmission is incorrect.
• Review the constant cycle transmission
setting.
• Does not operate in the
cycle time designated in
the constant cycle
transmission setting
• The cycle time is affected by some
causes.
• Remove the causes or designate the
cycle time anticipating the causes.
11.3.19 Condition agreement transmission is not performed normally.
Symptom Cause Corrective action MC
Non
procedure
protocol
Bidirectional
protocol
Pre-
defined
• The setting value of the condition
agreement transmission is incorrect.
• Review the condition agreement
transmission setting.
• Does not operate in the
cycle time designated in
condition agreement
transmission setting
• The cycle time is affected by some
causes.
• Remove the causes or designate the
cycle time anticipating the causes.
11.3.20 Data cannot be received due to by an interrupt program.
Symptom Cause Corrective action MC
Non
procedure
protocol
Bidirectional
protocol
Pre-
defined
• Interrupt issuance was not designated. • Designate interrupt issuance.
• Receiving by instruction other than
BUFRCVS.
• Use BUFRCVS instruction to receive
interrupt data.
• Cannot receive data with
the interrupt program
• "Parameter setting" - "PC system
setting" - or "Interrupt pointer setting"
are not set on the programmable
controller CPU side, or the settings are
incorrect.
• Review "Parameter setting" - "PS
system setting" - "Interrupt pointer
setting" on the programmable controller
CPU side