To debug a PLC program without I/O module, I set I/Os as 'no equipment'. Then, I tried to set input contact (X) using switch of MONITOUCH. However, the PLC input did not operate. Why?

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  • GLOBAL > PLC > SPH > Support tool (Standard) > To debug a PLC program without I/O module, I set I/Os as 'no equipment'. Then, I tried to set input contact (X) using switch of MONITOUCH. However,...
  • No : 1658
  • Displayed Date : 2023/04/25 19:00
  • Updated DTM : 2023/06/09 14:04
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To debug a PLC program without I/O module, I set I/Os as 'no equipment'. Then, I tried to set input contact (X) using switch of MONITOUCH. However, the PLC input did not operate. Why?

To debug a PLC program without I/O module, I set I/Os as 'no equipment'. Then, I tried to set input contact (X) using switch of MONITOUCH. However, the PLC input did not operate. Why?
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Answer

In Standard loader, to access the input memory from MONITOUCH, cancel the I/O group setting of the input specified as 'no equipment.'
If the input specified as 'no equipment' is registered in an I/O group, access to the input memory (X) from MONITOUCH is ignored because I/O refresh is executed in the PLC. The output memory is not affected.
 
*1   When you cancel 'no equipment' setting for actual operation, be sure to make I/O group setting.
      Without I/O group setting, I/O modules do not operate.
*2   In Expert (D300win), you do not need to cancel the I/O group setting of I/Os specified as 'no equipment.'

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