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====== Variant "Read" b) Read product data (base product + product code) ======

|<70% 20% 10% 45% 15%>|
|^Variable ^Data type ^Description ^Direction|
|Read* |BOOL |This variable sets PLC when new data is available and PLC sets it back to FALSE |From PLC to MES|
|Read* |BOOL |This variable describes MES with TRUE, if the data was stored in the database. MES resets it to FALSE |From MES to PLC|
|Product ID* |STRING |The generated database GUID is passed from MES to PLC, so that the measured values can be assigned faster |From MES to PLC|
|Product Code* |STRING |The generated product code is set by PLC for MES |From PLC to MES|
|Product* |STRING |The product is set by PLC for MES |From PLC to MES|
|Measured value 1..N |miscellaneous |The measured values or states of the produced part can be evaluated by the PLC in various data formats |From MES to PLC|

{{:de:mes-schnittstellen:mes-datacollector:pde:lesen:lesen-b:pasted:20220520-121725.png}}

  * Section 1:	
    * //{Product}// is set by PLC at least 300ms before //{Read}//.
    * //{product code}// is set by PLC at least 300ms before //{read}//
  * Section 2:	
    * //{Read}// is set by PLC
  * Section 3:	
    * //{Product ID}// is set by MES
    * //{measured values 1..N}// are optionally set by MES
  * Section 4:	
    * //{Read}// is set by MES.
  * Section 5:	
    * //{Read}// is reset by PLC (**Reason**: rising edge //{Read}//).
    * //{Product}// is reset by PLC (**Reason**: rising edge //{Read}//)
    * //{Product code}// is reset by PLC (**Reason**: rising edge //{Read}//)
  * Section 6:	
    * //{Read}// is reset by MES (**Reason**: falling edge of //{Read}//)
    * //{Product ID}// is reset by MES (**Reason**: falling edge of //{Read}//)
    * //{Measured values 1..N}// are reset by MES (**Reason**: falling edge of //{Read}//)