Shift production logging

[Gazzr]

I have created a small program for S7-200 to monitor what percentage a machine runs out of an 8 hour shift. Ie, the machine stops and starts many times during the 8 hours and I want to have a "live" percentage displayed on a TD200 unit and also log this to memory at the end of the shift, reset and start again. I was wondering if one of the guru's who visit here would take a look at it for me and maybe tell me where things could be done better as this is the first time I have had to handle data. Or a S7-200 for that matter. Any advice would be greatly appreciated. (This program is only a trial of this idea, once happy with it, I will integrate with another trial I have on the go.) Thanks for reading, I hope it made sense. I will send program to any generous person that offers. Edited March 10, 2007 by Gazzr

[Gazzr]

Also, as more of a topic for discussion. What are my options for outputing this information each week? Can the accumulated info be sent as a file somehow? By wire / or wireless would be even better. Anybody have experience with this?

[Crossbow]

If you post the file you might get more responses. Or send me a PM with a copy. But public works for more answers.

[Moggie]

Please post or send direct to me. There is a modem, EM241, for the S7 200 PLC's and also an Ethernet and/or a internet connection. All with set up wizards that you can use to transfer data.

[Gazzr]

Here is my first attempt at program. Any feedback welcomed, as i am convinced it could be done easier. Especially network 8, which i'm sure need not be there at all, if i knew how to use the data block editor...... I also should mention that i was provided with the Read RTC subroutine. (Many thanks) Percent_log_2mc.rar Edited March 13, 2007 by Gazzr

[Gazzr]

Thanks for the info Moggie. Using the modules you mentioned, can the plc be set to automatically transmit a set of data at a given time? And would the recipient computer have to be running specific software. An ideal solution would be to output an excel file or something similar. Can this be done?

[Crossbow]

There is software (typically an OPC server or ActiveX control) which can be used to retrieve data from a PLC and drop it onto an Excel spreadsheet. Siemens has an OPC Server for the S7-200 called S7-200 PC Access. It will allow you to poll the PLC for data at fixed intervals. Might want to go try to get a catalog or manual on it's capabilities.