Hi,  Agilesh, for answer your this topic, I checked all posts of yours

I guess your most tasks are to the jobs management Siemens automation (CNC, servo,PLC) with 3rd parties (Non- Siemens ) devices. communication? monitoring? I cannot know what your exactly task. but for   this purpose. you need to very familiar with Siemens SINUMERIK 840D , such as your todays topic --no body can give you simply answer. I can suggest your to read what kind of Siemens manuals --You have a long way to go " to collection 840D data'

I will attach the book list  ---read , your target is to understand all those data you want , in Siemens controller , there are System Variables, you need find which one is your need. it looks like this 

$AC_SMODE[x] ----Spindle mode

Agilesh

Hi,

 I am having the following CNC Models

1. NC - NCU 571.3 6FC5357-0BB11-0AE1 A5E00113657 ABCDE

    HMI - Sinumerik 840D MMC 103

2. NC - NCU 571.3 6FC5357-0BB11-0AE1 570038962630 ABCDE

    HMI - Sinumerik 810D/840D PCU50

I have to fetch data like

Cycle Start, Cycle End, Servo Speed, Servo Position, Spindle Speed, Spindle Load, Servo Load, Current Program, Alarms, Spindle, and Servo ON/OFF state

I am do know the possible ways to collect data and need support in collecting data from these devices