Hello everyone! I’m in the process of upgrading an existing PLC system that features a Symax Model 300 PLC. My plan is to replace it with an Allen-Bradley ControlLogix system. Thanks to OZEE, I have a printed copy of the old program, but I’m struggling to comprehend a few instructions. For instance, there’s a timer with input logic conditions that trigger the timing, similar to typical timers, but it also has a direct connection to its “clear” input. Additionally, there’s another timer with comparable connections, except it contains some logic that activates the “clear” bit. I’m quite uncertain about how these timers function. It would be incredibly beneficial to have a reference for the instruction set of the Symax PLC. If anyone has access to such resources, please share! I’m open to covering shipping costs for a hardcopy. Thank you all for your assistance; I truly appreciate any help!
Every SY/Max timer is equipped with two control lines. The upper line, labeled HOLD, allows for start and stop functions without resetting the timer. The lower line, named CLEAR, is responsible for clearing and resetting the timer. In typical timing applications—accounting for over 90% of usage—the upper line acts as a direct connection to the power rail, with most control operations managed via the middle line. For comprehensive technical resources, including an extensive collection of legacy SY/Max documentation, Square D provides a technical library.
Hello everyone! I am currently in the process of upgrading an existing PLC system that uses the Symax Model 300 PLC. I am transitioning to an Allen-Bradley ControlLogix system. Thanks to OZEE, I have a printed copy of the old program, but I am encountering some instructions that I find challenging to understand. One particular timer has input logic conditions that initiate the timing (similar to other timers), yet it also has a direct connection to its "clear" input. Another timer exhibits similar wiring, with the main difference being that it features logic to trigger the "clear" bit. I’m unsure how these timers function within the system. It would be incredibly beneficial to receive an instruction set reference for the Symax PLC. If anyone has this information, I would greatly appreciate you sharing it with me. I’m even willing to cover shipping costs for a hardcopy. Thank you in advance for any assistance you can provide! For further reference, you can check out the programming manual where timers are discussed in Chapter 15: [Programming Manual](http://ecatalog.squared.com/techlib/docdetail.cfm?oid=090089268010779d).
Thank you for the insightful information, Jim. Unfortunately, I need more details to fully understand the issue. I'm particularly concerned about two specific rungs from the program that are causing me some confusion. Could you assist me in interpreting them? Here are the details: ``` TIME | T6 | s0035 | -------------------------------------------------- | 0.1M | | =9999 | | T6 | | 0104 | *--06--* The next rung is: T6 OUT | 0022[] IF S0035 > S0085 | (----) ``` What do these instructions signify in the context of Allen-Bradley programming? I've searched the cross-reference and tag list but cannot locate addresses S0035 and S0085. Could you explain what these addresses represent?
This comprehensive manual provides detailed instructions for processor models 300, 400, and 600. It refers to the SFW472 programming software, but it is important to note that the timer settings are identical for both SFW472 and SFW374 programming software.
It removed all the spacing... I will retype the document in Word and attach the file for you.
Hey there! Upgrading from a Symax to a ControlLogix sounds like quite the project; best of luck with it! As for the timers, it sounds like you're dealing with a slightly more complex setup where the timers have some interdependence with their clear logic. It's common for timers in older systems to have unique features! For documentation, I’d recommend checking out any online forums or user groups dedicated to Symax PLCs, as sometimes users share scanned manuals. You might also reach out to Rockwell Automation directly, as they sometimes have resources for legacy systems. If you find any specific functions confusing, feel free to share them here—the community might have some insight that could clarify things for you!
Hey! Upgrading from a Symax to an Allen-Bradley system sounds like quite the project! For the timers you're dealing with, it sounds like they might be configured for a specific control logic that allows for dynamic resetting based on conditions. These setups can get a bit tricky, especially when trying to map them to ControlLogix timers. As for the instruction set, I recommend checking online forums or user groups focused on legacy PLC systems—many enthusiasts might have scanned copies or references they can share. Plus, don't hesitate to reach out directly to Schneider Electric; they might have archived manuals that could help you. Good luck with the upgrade!
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