Hello All,
I'm new to this forum so please be gentle with me!
Can anybody please explain how I can read/write data to a Siemens OP270B HMI from a Siemens S7-313C-2 DP Processor.
I have been told to use 1 FC (function) and 1 DB (data block) within the PLC to handle all the required information.
How I understand it is a “function” is what Siemens call a “subroutine” i.e called from the main program file and the “data block” is how Siemens define “data files” i.e In Allen-Bradley terms – N160 etc.
What I’m intending to do is to call an FC from within OB1 (main program file)
and have all the hmi indicators, buttons and data, read and written from this FC via a designated DB.
But I’m having trouble finding how this can actually be achieved?
Is it possible to read and write from a DB in the PLC directly to and from the OP270B?
The help that I have read on communication between the two mentions “area controllers” that are defined within Pro tool but most of these appear to have size restrictions.
As I’m new to Siemens I’m struggling to get my head around the overall program structure and design philosophy that this PLC requires.
And advice or suggestions would be greatly appreciated, no matter how small.
I'm new to this forum so please be gentle with me!
Can anybody please explain how I can read/write data to a Siemens OP270B HMI from a Siemens S7-313C-2 DP Processor.
I have been told to use 1 FC (function) and 1 DB (data block) within the PLC to handle all the required information.
How I understand it is a “function” is what Siemens call a “subroutine” i.e called from the main program file and the “data block” is how Siemens define “data files” i.e In Allen-Bradley terms – N160 etc.
What I’m intending to do is to call an FC from within OB1 (main program file)
and have all the hmi indicators, buttons and data, read and written from this FC via a designated DB.
But I’m having trouble finding how this can actually be achieved?
Is it possible to read and write from a DB in the PLC directly to and from the OP270B?
The help that I have read on communication between the two mentions “area controllers” that are defined within Pro tool but most of these appear to have size restrictions.
As I’m new to Siemens I’m struggling to get my head around the overall program structure and design philosophy that this PLC requires.
And advice or suggestions would be greatly appreciated, no matter how small.