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====== Variant "Write" a) MES generates the product code ======

|<70% 20% 10% 45% 15%>|
|^Variable ^Data type ^Description ^Direction|
|Write*       |BOOL   |If new product data is available, the variable is set to TRUE by the PLC. After successful saving, the PLC sets the variable back to FALSE. |From PLC to MES|
|Written*     |BOOL   |This variable writes TRUE by MES when the data has been stored in the database. MES resets it to FALSE |From MES to PLC|
|ProductName* |STRING |The PLC can use this variable to specify a product; e.g. the recipe name (can be static) |From PLC to MES|
|ProductCode* |STRING |The product code generated by the MES is made available to the PLC. This code is applied to the product.|From MES to PLC|
|ProductGUID* |STRING |The database GUID generated by the MES is made available to the PLC. It is an internal unique ID.|From MES to PLC|
|Template     |STRING |This variable can be used to specify the pattern for the creation of the product code by the PLC.|From PLC to MES|
|Addition     |STRING |The content of this variable is written to a placeholder within the product code (Template). |From PLC to MES|

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  * Section 1: 
    * //{Product}// is set by PLC at least 300ms before //{Write//}
    * //{PLCPattern}// is optionally set by PLC 
    * //{Addition}// is optionally set by PLC.
  * Section 2: 
    * //{Write}// is set by PLC.
  * Section 3: 
    * //{product code}// is set by MES 
    * //{product ID}// is set by MES
  * Section 4: 
    * //{Written}// is set by MES.
  * Section 5: 
    * //{Write}// is reset by PLC (**Reason**: rising edge //{Write}//). 
    * //{Product}// is reset by PLC (**Reason**: rising edge //{Written}//) 
    * //{PLCPattern}// is reset by PLC (**Reason**: rising edge //{Written}//) 
    * //{Addition}// is reset by the PLC (**Reason**: rising edge //{Written}//)
  * Section 6: 
    * //{Written}// is reset by MES (**Reason**: falling edge of //{Written}//). 
    * //{Product code}// is reset by MES (**Reason**: falling edge of //{Write}//) 
    * //{Product ID}// is reset by MES (**Reason**: falling edge of //{Write}//)