I have two sensors and their process data is constantly read on the HMI screen. Is there a possibility for time stamp at the desired interval or a possibility of saving a log file where all the readings from the sensor are recorded at a sampling interval (just like a .csv file)
Time stamp or data log in STEP 7
- Thread starter spandy16
- Start date
Hi,
By means of using the following functions u can achieve ur time stamp concept
1) RTC set & read
2) Datalog Create, write function
Check the below link for sample code,
http://www.automation.siemens.com/W...ow.aspx?PageIndex=1&PostID=279240&Language=en
Still not successful then i will give u my sample code as i already did for time stamp recording
Regards,
Nelliyan.G
By means of using the following functions u can achieve ur time stamp concept
1) RTC set & read
2) Datalog Create, write function
Check the below link for sample code,
http://www.automation.siemens.com/W...ow.aspx?PageIndex=1&PostID=279240&Language=en
Still not successful then i will give u my sample code as i already did for time stamp recording
Regards,
Nelliyan.G
Last edited:
Sorry, I didn't mention that I'm using IM 151-8 PN/DP CPU which is based on S7-300 CPU and STEP 7 V11 TIA Portal.
So will it be possible to use these instructions?
How accurate must the timestamp be ?
If accurate to the millisecond, then you have to involve code in the PLC.
If accurate to the second, then just make a regular datalog in the HMI. The timestamp will be based on the PCs or Panels internal clock.
If accurate to the millisecond, then you have to involve code in the PLC.
If accurate to the second, then just make a regular datalog in the HMI. The timestamp will be based on the PCs or Panels internal clock.
Thanks. Not needed to be so accurate to millisecond. But I doubt the availability of datalog function in the basic panel which I'm using along with WINCC Basic V11.
Can you tell me the general structure of code if I have to implement the data log function in the PLC code. It would be very helpful.
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