Precaitions For Dedicated Instructions - Mitsubishi Electric MELSEC iQ-F FX5 Series User Manual

8.1

Precaitions for Dedicated Instructions

This section describes precautions when using dedicated instructions.
Precautions for dedicated instructions (common)
■When changing data specified by dedicated instructions
Do not change any data (such as control data) until execution of the dedicated instruction is completed.
■When the dedicated instruction is not completed
Check whether the mode of the FX5-CCLGN-MS is set to online.
A dedicated instruction cannot be executed when the mode is offline or module communication test.
Precautions for link dedicated instructions
The following describes precautions when executing multiple link dedicated instructions simultaneously.
■Channel of the link dedicated instructions
When executing multiple link dedicated instructions simultaneously, check that the channels for the instructions are not
duplicated. Link dedicated instructions with the same channel number cannot be executed simultaneously. To use the same
channel for multiple link dedicated instructions, configure an interlock so that an instruction is executed after completion of
another.
■When link dedicated instructions are executed simultaneously
When link dedicated instructions are executed simultaneously, the subsequently requested instruction is skipped. When the
instruction is skipped, the dedicated instruction skip flag (SM699) turns on.
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8.1 Precaitions for Dedicated Instructions