Runtime part of Analog Input
Organizer package is function of STEP 7
program for PLC SIMATIC S7-300 of
S7-400.
Complete
STEP 7 project with this function appears in your installation directory of
AI_Org after authorization.
It is file
AI_OrgS7.zip. For unzipping this file you can use Retrieve function from STEP7
Manager.
This
function FC100 - AI_Treat is written in STL language of STEP 7. FC100 reads AI from PIW, recalculate it
to physical
units,
makes plausibility checks, filters, sets alarm limits and switch points. For
number consequent AIs in the loop.
All data
are saved in DB100
FC 100 & DB100 - can be freely renumbered to
any allowed number ! FC 100 uses NO marker from
memory ( M ) area inside
Number of
treated AI is not limited by FC100 but by allowed length of datablock where
appropriate values for
AI
treatment are stored. FC100 is called on the beginning of OB 1. FC 100 has some
parameters which define
its exact
behavior.
One of the
parameters is DB100 which is generated by using AI_Org.exe.
FC100 can be called multiple times and can reference
different data areas.
Start_Addr_PIW : address of first AI in the continuos area
Count_AI : count of AIs which should be treated in the
loop ( in one pass of thtis FC )
DB_Val : DB for AI treatment ( DB created in
AI_Org.exe - with
appropriate structure )
Start_Byte_DB : number of first byte of data for AI treatment.
This example shows case of
treating 6 AIs where first start on PIW 512. The appropriate data are stored
in DB 100 from DBB0 ( byte 0 )
On request we can provide printout of block
FC100.
One pass in
the loop of AI treatment covers this functions
