Ras Function; Inter-Module Synchronous Interrupt Program Execution Time Monitor; Inter-Module Synchronization Signal Error Monitoring; Monitor Of Output Exceeding Inter-Module Synchronization Cycle - Mitsubishi Electric MELSEC iQ-R Series Reference Manual

Inter-module synchronization function

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8.2

RAS Function

Shows the RAS functions related to the inter-module synchronization function.

Inter-module synchronous interrupt program execution time

monitor

The error detection setting is used to monitor the inter-module synchronous interrupt program's execution time. Set whether to

detect an error related to the inter-module synchronous interrupt program's execution time. When an error is detected, the

number of cycle overs is stored in SD480. For details on the setting method of error detection setting and special register,

refer to the following.

 MELSEC iQ-R CPU Module User's Manual (Application)

When synchronizing via a network module, even if an error is detected at the master station's CPU module is

till not be detected at the local station. Therefore, to stop the local station when an error occurs, prepare a

program to monitor the master station status using the network module's link special registers, etc.

Each module monitors for errors in the inter-module signal cycle, and generates a moderate error if an error is detected. The

CPU module can monitor for errors in the inter-module synchronization signal with SM488.

The D/A converter module monitors whether the output preparation process is completed before the next inter-module

synchronization cycle. If the inter-module synchronous interrupt program does not complete before the next inter-module

synchronization cycle starts, an error will occur even if the output preparation process has not started. If the output

preparation process is constantly delayed, a cycle over will always occur. Set the inter-module synchronization cycle to a

value at which the D/A converter module's output conversion can accurately finish.

The CC-Link IE Field Network master/local module's master station monitors whether the cyclic transmission is completed

before the next inter-module synchronization cycle. If the inter-module synchronous interrupt program does not complete

before the next inter-module synchronization cycle starts, an error will occur even if the cyclic transmission process has not

started. If the cyclic transmission process is constantly delayed, a cycle over will always occur. Set the inter-module

synchronization cycle to a value higher than the link scan time.

8 TROUBLESHOOTING

8.2 RAS Function

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