Constant Cycle Transmission Is Not Performed Normally; Condition Agreement Transmission Is Not Performed Normally; Data Cannot Be Received Due To By An Interrupt Program; Data Cannot Be Written To The Flash Rom - Mitsubishi Melsec-L Series User Manual

15.3.18 Constant cycle transmission is not performed normally

Symptom
• Does not operate in the • The setting value of the constant cycle
cycle time designated in
the constant cycle
• The cycle time is affected by some
transmission setting

15.3.19 Condition agreement transmission is not performed normally

Symptom
• Does not operate in the • The setting value of the condition
cycle time designated in
condition agreement
• The cycle time is affected by some
transmission setting

15.3.20 Data cannot be received due to by an interrupt program

Symptom
• Interrupt issuance was not designated.
• Receiving by instruction other than
• Cannot receive data with
• "PLC Parameter" - "PLC System" - or
the interrupt program

15.3.21 Data cannot be written to the flash ROM

Symptom
• Flash ROM write allow/prohibit was not
• Cannot write data to
• Setting modification is not enabled in the
Flash ROM
• The C24 was turned off during writing to
• Communication with GX Works2 was
• The data written to the
flash ROM are not valid.
• When data is written to the
15 - 53
Cause
transmission is incorrect.
causes.
Cause
agreement transmission is incorrect.
causes.
Cause
BUFRCVS.
"Interrupt Pointer Setting" are not set on
the CPU module side, or the settings
are incorrect.
Cause
set to allow.
switch settings by GX Works2.
the flash ROM.
interrupted during writing to the flash
ROM.
Programmable controller, C24 of the
"Intelligent Function Module" tab is not
set as a target memory on the "Online
Data Operation" screen.
Corrective action
• Review the constant cycle transmission
setting.
• Remove the causes or designate the
cycle 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 "L Parameter Setting" - "PC
System" - "Interrupt Pointer Setting" on
the CPU module side
Corrective action
• Set flash ROM write allow/prohibit to
allow.
• Set "Enable" in the switch setting by GX
Works2.
• Write the data again to the flash ROM.
• Check the procedure for writing data to
the flash ROM, and write the data to the
flash ROM again. (refer to Section 7.4.2)
15 TROUBLESHOOTING
Non-
Bidirectional
MC procedural
protocol
protocol
Non-
Bidirectional
MC procedural
protocol
protocol
Non-
Bidirectional
MC procedural
protocol
protocol
Non-
Bidirectional
MC procedural Predefined
protocol
protocol
15 - 53
Pre-
defined
Pre-
defined
Pre-
defined