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Subject: DISTRIBUTED I/O FOR PLC's

Date: 09/07/99
Posted by: jeremy hyne
E-mail: jeremyhyne(at)worldnet(dot)att(dot)net(no spam)
URL: http://

Message:

I want to utilize distributed I/O on a new machine. All inputs and outputs are digital (no analogue) There are two choices to communicate and control the bus I/O. 1)Add a bus scanner into existing PLC rack ( I am using an AB SLC503) and write the ladder logic in the PLC. 2)Buy an integrated controller (ASI or Interbus) and write the logic in this controller. What is ladder programming in the integrated controller like in comparison with PLC ladder logic. Is it as powerful as a PLC in instruction sets, data handling etc.? Learning curve on sofware? Any pointers on installation cost? Eases of network setup and configuration? Vendor support? Network speed issues - scan time? Some answers/advice to these questions from those with some good practical experience would be most welcome. Thanks Jeremy,

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