C Intelligent Function Module Dedicated Functions; Program Processing; Considerations - Mitsubishi Electric MELSEC iQ-R Series Manual

1.2
C Intelligent Function Module Dedicated
Functions
C intelligent function module dedicated functions of the dedicated function libraries are used to control C intelligent function
module.
These functions can be used for reading status of the module or accessing resources such as LED control.

Program processing

The following procedure shows the processing flow of the user program using C intelligent function module.
1.
Start a task.
2.
Read the status of C intelligent function module and access the resources such as LED control by using the C intelligent
function module dedicated function.
3.
Complete the task.

Considerations

The following shows the considerations when using the C intelligent function module dedicated function.
Considerations for user WDT (User watchdog timer)
■ A user WDT error occurrence
If a user WDT cannot be reset due to a user program runaway, a user WDT error will occur.
In this case, take the following corrective actions.
• Increase the user WDT period set with the CITL_StartWDT function.
• Lower the number of tasks with high CPU utilization or make them deactivated.
• Review the user program.
Reset the C intelligent function module once the corrective actions have been taken.
In the user program, a user WDT can be used to monitor the hardware and status of user program, and
processing timeout for accessing and controlling each module.
■ User WDT setting range
The user WDT period can be set within the range of 100 ms to 10,000 ms.

1.2 C Intelligent Function Module Dedicated Functions

1 COMMON ITEMS
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