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Warehouse storage and handling

Discussion:

Using PLC for MHS

Number of messages: 7

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chewingyu
Singapore, Singapore

Is there a conventional wisdom when to use or not to use PLC (programmable logic control) when purchasing or upgrading a warehouse equipment? I mean, if it is just a simple equipment like the warehouse bridge vehicle (BV) where the BV functions are just to transfer ULDs from one storage lane to another, do I really need to put in a PLC? Wouldn't the use of just contactors be good enough?

Posted 26 Jun 2006 02:34 PM

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joseph_h
Michigan, United States

Google: ENG-TIPS PLC (It is likely the best link for your current question.)

Google: MATERIALS HANDLING EQUIPMENT ENGINEERING FORUM

Google: FORUMS.SME.ORG (This is the Society for Manufacturing Engineers forum site.)

Modified 7 Aug 2006 08:05 PM
by poster.

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kathy_s
Zhejiang, China

are you a distributor of such equipment?

-------------------------
sing all the way

Posted 1 Nov 2006 02:00 PM

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daryl_h
Pennsylvania, United States

the plc concept will allow you to max out the systems current and future capabilities

Posted 26 Mar 2007 11:00 PM

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chewingyu
Singapore, Singapore

The problem with the use of PLCs is that models tend to change and we are faced with obsolescence frequently. And it is costly to revamp the PLC system to a newer model/make.

Posted 9 Oct 2007 05:51 PM

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matt_i
Georgia, United States

Relative to using contactors/relays...that's a step backward!

Think you have problems with obsolescence on a pure hardwired system...change one "rung" of logic and you'll spend literally hours wiring and checking, same as you could have done in 5 minutes at a desktop PC with no tools.

As far as obsolescence of PLCs, just make sure you have spare cards and support. Al Bradley ain't cheap but they are very reliable. There are other manufacturers too that have made millions of copies for which there is good availability

Best of luck.

Posted 20 Oct 2007 09:22 AM

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chewingyu
Singapore, Singapore

We don't use Allen Bradley - ain't cheap, as you said. Mostly we use Siemens, Telemechanique and Omron.

Familiar with these makes?

Posted 19 Nov 2007 05:12 PM

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