I recently received a message from someone who had just purchased a used machine with a SLC-500 based control system on it.
Because most of his existing systems use simple relay controls, the new owner of the machine was reaching out to me about training on the SLC-500, as well as to ask several questions which all boiled down to, “Is the SLC-500 still viable?”
I believe the reason for that question was due in large part to the fact that when he tried to get support for the SLC-500, he felt the local rep was only interested in selling him an upgrade to ControlLogix.
So today’s question is, “Is the SLC-500 still viable?”
To be frank, if you’re building a new system today you should absolutely not be using the SLC-500. In fact, it’s my opinion that any system you built in the last ten years should not have been built using a SLC-500.
While many of you may think that’s an obvious statement, just a few years ago a company duped one of our local towns here in the Berkshires into buying a complete control system based on the ancient SLC-500 (ugh.)
For those who don’t know, the SLC-500 product line came out nearly thirty years ago, and using it on new systems would be akin to using 286 PCs along with 5.25″ floppy disks.
That’s not to say it’s a bad product, or that you should worry about your installed base of SLC-500s, but you should be aware of a few things.
First, Rockwell makes very few new SLC-500s today, and they are expected to stop making all SLC-500 products in the coming years.
This means if you do use SLC-500s in production, you’ll want to be sure you acquire (and thoroughly test if recycled) ample spares to keep your machines going for years to come.
Second, you also need to be sure you know what and where your RSLogix 500 software licenses are, and consider getting a basic Rockwell support contract to cover your SLC-500 and RSLogix 500 if they’re used on critical machines.
If you don’t currently have SLC-500s in your plant, but you’re looking to buy a used machine that has one on it, you’ll want to take the following into consideration:
First, you need to be sure the machine runs!
No joke, I have seen more than one company buy a machine that does not run because the PLC no longer has the correct (or any) program loaded (i.e. the battery died, there’s no EEPROM present or it was never updated, etc.)
Second, you need to make sure you’re not locked out of the program because it has a password no one knows!
To properly troubleshoot a PLC system, you need to have access to the PLC program. But if it’s locked with a password no one knows, you won’t be able to access it.
Third, while Rockwell has unfortunately doubled the price of RSLogix 500 over the last decade (it now costs nearly $2,900) if you’re budgeting to buy a used machine that uses a SLC-500, also budget for a copy RSLogix 500 and a copy of my affordable PLC Basics course which will get you started with PLCs and RSLogix.
If you don’t, you may find yourself with a machine that goes down for days at a time as you wait for your local integrator to schedule a visit.
PS – I’m curious how many of you still have SLC-500’s running in your facility?
If you do, please let me know by clicking on the comment link below!
Until next time, Peace ✌️
If you enjoy this episode please give it a Like, and consider Sharing as this is the best way for us to find new guests to come on the show.
Shawn M Tierney
Technology Enthusiast & Content Creator
Eliminate commercials and gain access to my weekly full length hands-on, news, and Q&A sessions by becoming a member at The Automation Blog or on YouTube. You'll also find all of my affordable PLC, HMI, and SCADA courses at TheAutomationSchool.com.
- What’s New in Automation for Monday October 14, 2024 (W010) - October 14, 2024
- How to download RSLogix Micro, RSLinx, and Emulate 500 for free (2024) - October 14, 2024
- Automation Q & A for October 11, 2024 (QA018) - October 11, 2024
The Automation Blog's SLC-500 Library
Hardware
- Article: The SLC-500: Six Controllers
- Article: The SLC-500: Controller Image Gallery
- Article: The Fixed Style SLC-500
- Podcast: Programmable Controller Non-Volatile and Volatile Memory
Cables and Adapters
- Article: USB to Data Highway Plus using the ANC-120e, a lower cost alternative to the...
- Article: How to add Ethernet to a SLC-500
- Podcast: Adding DH-485 to your MicroLogix, SLC-5/04, SLC-5/05, and PanelView Plus 6 400 and 600.
Communications
- Article: The SLC-500: Communicate and Download over Serial DF1 using RSLinx and RSLogix 500
- Video: A-B SLC-500 Serial Comm Setup & Download
- Article: The SLC-500: Communicate and Download over DH-485 using RSLinx and RSLogix 500
- Video: A-B SLC-500 DH-485 Comm Setup & Download
- Article: PLC-5 and SLC-500: Communicate and Download over Data Highway Plus using RSLinx and RSLogix
- Article: Why the Allen-Bradley (A-B) 1747-PIC always had trouble working in Microsoft Windows
Software
- Article: What's new in RSLogix 500, Micro v11
- Article: RSLogix 5, 500, and Micro support for Windows XP / 7 / 8
- Article: RSLogix 500 and Micro Get Windows 8 Release
- Article: How to get a free copy of RSLogix Emulate 500
- Article: How to setup and use RS Emulate
Messaging
- Article: How to Message (MSG) data from a MicroLogix 1400 to a SLC-5/05 over Ethernet
- Video: How to Message (MSG) data from a MicroLogix to a SLC-500 over Ethernet
- Article: How to Message (MSG) data from a SLC-5/05 to a MicroLogix 1400 over Ethernet
- Video: How to Message (MSG) data from a SLC-500 to a MicroLogix over Ethernet
Connecting HMIs
- Article: Get A-B Programmable Controller data into Microsoft Excel using RSLinx
- Article: Connecting a PanelView Plus to a SLC-500 Channel 0 Serial Port
- Video: Flashback – FactoryTalk View Importing PLC-5 & SLC-500 Tags
Migration
- Article: How To Convert SLC-500 Programs to MicroLogix
- Video: Converting SLC-500 Programs to MicroLogix
- Article: Replace a Fixed SLC-500 (1747-Lxxx) with a MicroLogix
- Article: Converting your RSLogix 500 program to RSLogix 5000 using the Translate PLC-5 SLC 2.0...
- Article: Changes I would like to see made to Rockwell's Translate PLC-5 SLC 2.0 utility
- Article: Working around the Translate PLC-5 SLC 2.0 utility’s syntax error
Samples:
- Article: Flashback Friday! RSLogix 500 "Providence Beer" Demo
- Article: Flashback Friday! RSLogix 500 Top Ten Sort
Learning and Discussion:
- Article: Is the SLC-500 still viable?
- Article: Insight's Inbox: I can't connect to my SLC-500
- Article: Flashback Friday! The SLC-500 Blue Demo Case
- Article: Getting Started With Programmable Controllers (PLC)
Discover more from The Automation Blog
Subscribe to get the latest posts to your email.