pzd ,pzw and akz

i read a document on how to integrate a sipart closed loop controller to s7

it was written that i should assign the inputs to pdz ,the output to pdw
when i made my hardware configuration , only pdz and akz appeared , is akz equivlant to pzw
if i want to read/write a variable what should i use ? is it possible to write a PIw?

thanks

I have no idea what those abbreviations are for. If you have Simatic S7 fully installed you should be able to goto SIMATIC then S7 Manuals and see PID control (English and Deutsch), the pdf is S7PIDCOB.pdf. There is also a manual for parameter assignments.

i am not using s7 pid controller i am using a seperate standalone controller with a dp interface