Hi Guys,

I want create data log in siemens hmi TP900 comfort . I want log data in hmi and after one week send to usb. In fact i want load from hmi weekly or more.

And if possible my plc one bit is 1 start logging and 0 stop logging.

Pls help me for make this data logger.

Is emergency.

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Split from Data Logging on Comfort Panel (TP700) / WinCC - Multiple Questions.

If you look under the tree in the left-hand pane of TIA Portal, under your Comfort HMI device, you will find that one of the entries is ‘Historical data’. This is the key place where you will setup your data logging. It is fairly intuitive, but you can also use the help file for some clues. Essentially, you give your data log a name and then configure which tags are to be logged and how the logging is to work.

Realistically, if you want to control when logging starts and stops that is probably going to require VB scripts. You can do a certain amount on the value change event of a tag in the HMI Tags. But if you want to differentiate between rising and falling edges of a Boolean flag for example, then you will have to use the tag value change event to call the VB script and do the differentiation in the script. This is the difficulty with the value change event in Basic panels, there is no VB scripting and thus no way to distinguish between rising and falling edges. You end up having to use a toggling flag.

If none of this makes any sense to you, then it is probably far too big and complex a task to help you within a forum entry. You need to try to figure it out as much as you can, and when you are struggling with something, try to ask a more specific question that forum user’s have some chance to answer reasonably succinctly.