PLC event recorder

Discussion in 'Homework Help' started by ozi123, Feb 12, 2010.

  1. ozi123

    Thread Starter New Member

    Feb 12, 2010
    2
    0
    HI there,

    We have four stations in our factory that share one motor controlled by a mitsubishi PLC. Each stations have their own switches directly fed into the PLC. We want to record the duration of stoppages by each station to calculate their respective effciencies. Is there a way to capture data from the PLC directly. Its really a old PLC with only serial port.

    thanks
     
  2. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    Have you any experience with microcontrollers?

    hgmjr
     
  3. ozi123

    Thread Starter New Member

    Feb 12, 2010
    2
    0
    Yes I think I can manage
     
  4. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    I think its time to upgrade to a new PLC which connects to the PC via USB. There are new PLCs which can output excel files to the PC.
     
  5. GetDeviceInfo

    Senior Member

    Jun 7, 2009
    1,571
    230
    There are a couple of RS232 loggers for free on the net. At least one of them writes RS232 events to an csv file. Even old PLCs typically provide comm functions during run time, so it should be a simple matter of programming a comm function on input, that could be captured by a PC running the logger.
     
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