#Siemens step 7 write to string how to

Add вЂњPart NumberвЂќ to вЂњTempвЂќ in OB1, then add the four Inputs from the Tag Table to the Input side of Function Block, and finally add вЂњPart NumberвЂќ to the Output side of the Function Block: Image By Chris Wright Step 7) Now create a watch table and name it вЂPart Numbers'. This will create an вЂњInstance Data BlockвЂќ (IDB). It will also display the Part Number that was selected, and if no part is selected the output will display вЂNo Part': Image By Chris Wright Step 6) Now we need to add the вЂњPart ReferenceвЂќ FB1 to the OB1 Main Routine.

This logic will convert the Byte to Int, and then select the part number based on the inputs. The Inputs will write to the first 4 Bits of the Byte вЂњInput Code,вЂќ and are addressed as #вЂќInput CodeвЂќ.%X0 thru %X3 as shown below: Image By Chris Wright Step 5) Next, we'll add an вЂњSCL NetworkвЂќ to the Function Block. вЂPrograms' in the static section needs вЂњRetainвЂќ to be вЂњSet in IDB.вЂќ вЂњProgramsвЂќ is an Array 0вЂ¦15 with a max string length of 15: Image By Chris Wright Step 4) Now we will add the first Logic to the FB. These will be wired into our PLC as inputs, and therefore we need to add them to our PLC's tag table: Image By Chris Wright Step 2) Now that we've added our Input Tags, we'll next add a new Function Block to the program named вЂњPart ReferenceвЂќ: Image By Chris Wright Step 3) In this step we will add the data to the FB that will be used to вЂњselectвЂќ the part number of the product being made. Step 1) In this example we have four outputs on our machine that tells us which product is being made.

#Siemens step 7 write to string how to

Do you have a machine that you need to get data from? And do you need to send that data to another device but the machine lacks networking capabilities? In this article I'll show how to get data a your machine into a Siemens S7-1214C PLC by using the machine's existing outputs to select which data the PLC will make available over your network.