Mitsubishi QJ71C24/-R2 User Manual page 293

10 TROUBLESHOOTING
10.3.15 Troubleshooting when data cannot be communicated with the ISDN sub-address
Circumstance
• Sub-address is incorrect.
• Data cannot be • Modem does not support ISDN sub-
communicated with ISDN
sub-address
• Sub-address is incorrectly partitioned.
10.3.16 Troubleshooting when constant cycle transmission does not operate normally
Circumstance
• The setting value of the constant cycle
• Does not operate in the
cycle time designated in the
constant cycle transmission • The cycle time is affected by some causes. • Remove the causes or designate the cycle
setting
10.3.17 Troubleshooting when condition agreement transmission does not operate normally
Circumstance
• The setting value of the condition
• Does not operate in the
cycle time designated in
condition agreement • The cycle time is affected by some causes.
transmission setting
10.3.18 Troubleshooting when data cannot be received by an interrupt program
Circumstance
• Interrupt issuance was not designated.
• Receiving by instruction other than
• Cannot receive data with
• "Parameter setting" - "PC system setting" -
the interrupt program
10.3.19 Troubleshooting when data cannot be written to Flash ROM
Circumstance
• Flash ROM overwrite allow/prohibit was not
• Cannot write data to Flash
ROM
• Setting change was not set to allow in the
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Cause
address.
Cause
transmission is incorrect.
Cause
agreement transmission is incorrect.
Cause
BUFRCVS.
or "Interrupt pointer setting" are not set on
the PLC CPU side, or the settings are
incorrect.
Cause
set to allow.
switch settings by GX Developer.
Corrective action
• Review the sub-address.
• Use modem that supports ISDN sub-
address.
• Review how to partition the sub-address
using the TA manual.
Corrective action
• Review the constant cycle transmission
setting.
time anticipating the causes.
Corrective action
• Review the condition agreement
transmission setting.
• Remove the causes or designate the cycle
time anticipating the causes.
Corrective action
• Designate interrupt issuance.
• Use BUFRCVS instruction to receive
interrupt data.
• Review "Parameter setting" - "PS system
setting" - "Interrupt pointer setting" on the
PLC CPU side
Corrective action
• Set Flash ROM overwrite allow/prohibit to
allow.
• Set setting change to allow in the switch
setting by GX Developer.
MELSEC-Q
Non
Bidirection
MC procedure
al protocol
protocol
Non
Bidirection
MC procedure
al protocol
protocol
Non
Bidirection
MC procedure
al protocol
protocol
Non
Bidirection
MC procedure
al protocol
protocol
Non
Bidirection
MC procedure
al protocol
protocol
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