SIMATIC APT
SIMATIC Application Productivity Tool — APT is a software package that
you can use to design and implement a solution to your process control
problem. The capabilities of APT have been enhanced in Software
Release 1.9A. The documented differences between APT Release 1.9 and
Release 1.9A are indicated by change bars in the manual page margins.
APT continues to support two controller families, the Series 505 and the
SIMATIC S5. Most programming tasks, like writing a program
User Manua
https://cache.industry.siemens.com/dl/files/951/13839951/att_96400/v1/user.pdf
,,
SIMATIC APT
Programming Reference
(Graphics/Math)
Manual
https://cache.industry.siemens.com/dl/files/973/13836973/att_55434/v1/math.pdf