Hey guys,
Had an issue today with Allen Bradley PLC-5 using a 1794 flex analog input module, our plant had a power spike/dip causing grief with one of the modules on our PLC-5 rack.
One module was reading analog inputs values incorrectly, which was really weird as all the others were fine, I found that i had 4mA coming in from the field yet a 367 raw data reading was given, yet move that input to the next card along and 4mA would= roughly 6242 which is what i was hoping for.
I am using a block transfer read/write setup yet had no major or minor errors on the processor, in the end after trying numerous things i could not find anything wrong so by chance downloaded an old back-up file which seemed to work as i had the correct values in my analog card now, im hoping someone maybe able to explain what could have happened?
Thanks.
Had an issue today with Allen Bradley PLC-5 using a 1794 flex analog input module, our plant had a power spike/dip causing grief with one of the modules on our PLC-5 rack.
One module was reading analog inputs values incorrectly, which was really weird as all the others were fine, I found that i had 4mA coming in from the field yet a 367 raw data reading was given, yet move that input to the next card along and 4mA would= roughly 6242 which is what i was hoping for.
I am using a block transfer read/write setup yet had no major or minor errors on the processor, in the end after trying numerous things i could not find anything wrong so by chance downloaded an old back-up file which seemed to work as i had the correct values in my analog card now, im hoping someone maybe able to explain what could have happened?
Thanks.
