A query was raised regarding the storage of bits in bytes, particularly in relation to the transfer of data from a TI505 series PLC to a non-TI PLC. If a byte with a value of 1 was sent, would it display as 128 on the receiving end? While I have experience manipulating bytes and words to ensure accurate numerical values, the intricacies of bit storage remain unexplored.
Regarding the longevity and durability of PLC models, such as the L8X compared to the L7X or CLX versus SLC5, it is challenging to draw definitive conclusions without sufficient time data. While anecdotal evidence suggests that L55 PLCs have stood the test of time, concrete data is lacking. It may be advisable to reconstruct the PLC program from scratch, as conversion tools may not always produce optimal results. Uncommented code resulting from a SLC to CLX conversion can be cumbersome to navigate, necessitating additional efforts to enhance readability.
Over the past few years, I have installed numerous L8 processors without encountering any issues. I completely agree with the suggestion to rewrite the program from scratch, especially if Ignition is being used. Proper utilization of UDT's/AOI's can greatly simplify the integration of Logix and Ignition systems.
ASF shared their positive experience with using L8 processors in recent years. They agree with robertmee's suggestion to rewrite programs from scratch, especially when integrating Logix/Ignition with proper use of UDT's/AOI's. It may be beneficial to refer to the detailed 86-page PDF manual outlining the differences between L7x and L8x processors. When comparing new hardware to SLC or PLC5, it is important to take note of potential quirks. For instance, 5069 cards may be sensitive to noise. Consider utilizing alternative IO on E/IP if opting for AD. While projects with P1K (linked to Ignition) have been successful, exploring the P2K system may offer additional benefits.
In the world of PLC programming, the order in which bits are stored and referred to can make a significant difference. For example, when a TI505 series PLC sends a byte with a value of 1 to a non-TI PLC, it may show up as 128 due to the way the bits are arranged. This manipulation of bytes and words is common practice for ensuring accurate numerical values in programming.
Regarding the durability of PLC models like the L8X compared to previous versions, it's important to consider how they stack up against each other. While anecdotal evidence suggests that L55 PLCs have stood the test of time, hard data on longevity is still lacking. It may be worth investing the time and effort to rewrite a PLC program from scratch to avoid compatibility issues between different models.
When converting TI integers to AB integers, it's crucial to understand the bit arrangement differences between the two systems. For instance, bit 1 to 16 in a TI integer correspond to bits 15 to 0 in an AB integer. This discrepancy is often attributed to the use of Motorola processors in older systems.
Overall, taking the time to rewrite PLC programs and understand the nuances of bit storage can lead to smoother integration and more accurate data handling in the long run. By paying attention to these details, programmers can avoid compatibility issues and ensure seamless communication between different PLC models.
The_msp mentioned a lengthy 86-page PDF manual detailing the differences between L7x and L8x hardware. When comparing the new hardware to SLC or PLC5, it seems that 5069 cards may be susceptible to noise issues. In the event of using an AD, alternative IO on E/IP might be considered. While I have yet to work with the P2K, I have completed several projects with the P1K mapped to Ignition without any complaints so far.
Although I have seen posts discussing problems with 5069 cards, personally, I have not encountered any issues while using them. There are notable distinctions between L7 and L8 processors, much like between the 5370 and 5380 Compact Logix models. In my experience, the advancements introduced in the L8 series are all positive changes. Certain features in the L8 series that I find appealing are unfortunately not backward compatible with the L7 series. From a hardware standpoint, it is difficult to determine their reliability as it typically takes around 10 years of operation without issues to label something as "reliable," and I have only been working with L8's for 5-6 years. Nevertheless, I have not encountered any failures or negative behavior during this time.
In my opinion, the 5580 and 5380 hardware feels more robustly constructed compared to their 5570 and 5370 counterparts. This judgment is solely based on the feel of the hardware during installation and not on a technical teardown assessment.
The process of converting 500 to 5000 PLC programs can be challenging from a maintenance perspective. The conversion tool turns all SLC data tables into separate tags, which can be overwhelming for maintenance personnel troubleshooting the system. In some cases, it may be more efficient to start the conversion from scratch for smaller programs. However, we have also received SLC to CLX programs from OEMs.
I have witnessed programs being upgraded from 500 to 5000 lines of code. When I transitioned from PLC5, I manually transcribed the program, eliminating outdated code in the process. Despite the process taking a few days to complete, the end result was a much more streamlined system. Investing a couple of days upfront in ensuring a program is optimized for long-term use is a wise decision for a system expected to run for many years.
I am seeking insights from individuals who have hands-on experience with Phoenix Contact's AxioLine Remote IO in either Ethernet/IP or ModbusTCP interfaces. I rely on a range of PT terminals, distribution equipment, and relays for my projects. Feel free to share your thoughts on the user-friendly "push-in" feature of these systems. For more information, visit Phoenix Contact's website.
the_msp inquired if anyone has firsthand experience with Phoenix Contact AxioLine Remote IO using either Ethernet/IP or ModbusTCP. While they prefer push-in terminals for their setup, they shared concerns about the quality of Phoenix Contact products lately. Despite facing issues themselves, they advised that individual experiences may vary. Explore more about Phoenix Contact AxioLine Remote IO here: https://www.phoenixcontact.com/en/g...-systems#ex-content-transclusion-snippet--682.
Upgrade your SLC system to a 5069 with our convenient conversion kits. These kits make wiring a breeze and can be installed on-site in just one hour. Watch instructional videos for a step-by-step guide on how to use the 1492-CH1746-13 kit for a 13-slot conversion.
When considering upgrades, the first step is to assess the system and identify any components that can be transitioned to remote operation. It is important to carefully strategize the best approach for the upgrade process. In my experience, I do not believe that upgrading from a SLC505 to CLX is necessary, even with remote capabilities. Evaluate the potential of using a 5380 CPL and determine its compatibility. I have utilized these products since their launch, in addition to the 5069 IO, without encountering any issues. It is advisable to thoroughly review the manuals to understand how the devices function, but once familiarized, the process becomes straightforward.
In my early days, I gained valuable experience working on upgrades. My very first project involved enhancing an SLC 150 by adding the 150E expansion from a different brand back in 2008. I haven't worked with AB since V30, primarily focusing on CPX. The last CLX I worked on was a L6x. Considering all of that, cheeseFace, that seems like a promising option.
The decision is yours to make, choose whichever option you deem essential.
I cannot understand the reasoning behind replacing an SLC500, even if it is equipped with racks and DN/SN features, with a CLX. However, if that is the necessary upgrade, then it should be done according to your judgment.
The concept of obsolescence and the impact of greed on inflation.
I didn't check the currency exchange rate, but I did access my account at my local Rockwell distributor. Oh dear!
I can also access Original Equipment Manufacturer (OEM) Pricing. Double the shock!
Absolutely. The engineering manager on-site has reservations about eBay/Radwell refurbished equipment. I can't disclose the machine's function because of a non-disclosure agreement, but it operates at approximately 300 parts per minute. Downtime is costly. I initially mentioned CLX in my original post because I believed it may have the necessary conversion kit. However, I now prefer CPX. Thank you to everyone for your valuable insights.
The MSP mentioned their hesitation on eBay/Radwell refurbished items as the engineering manager on-site does not trust them. They are a registered Rockwell user and could potentially negotiate a discount with their Kendall account manager. However, they do not see the urgency in purchasing such items unless necessary.
I vividly recall the moment the PLC5 was phased out. Our account manager seized the opportunity by selling (2) processors (possibly 40E model) to a nearby company for $40,000 each. Unfortunately, the specific details of the PLC5 numbering system escape me.
I am offering a few gently used Cisco 551 routers for sale, with customizable rack and I/O options. SN/DNS choices are also available. As a bonus, I include a complimentary battery with each purchase. Contact me for more details.
Padees is offering "lightly used" 551's for sale, which come with a rack and the option to choose your I/O, with SN/DNS options available. Every purchase also includes a free battery. It's no surprise that L553's sell quickly whenever they're in stock. The_msp noted that the engineering manager at the site doesn't trust eBay/Radwell refurbishments. It's worth mentioning that there are also new counterfeit products for sale at low prices.
- 07-01-2025
- geniusintraining
When it comes to converting PLC programs, I prefer to recreate them rather than using conversion tools. Swapping data files with tag arrays can be problematic. I lean towards using 5069 for SLC replacement, although Rockwell is our go-to choice. Copying and pasting rung structures can simplify the conversion process. I also aim to establish an Ethernet connection for the PowerFlex.
I have been developing a ControlLogix program to replace a PLC5. To streamline the process, I have been transferring rungs from Logix 5 to Studio 5000 for sequences that do not align with my usual routines. This method has proven to be a time-saver for creating rung structures. After that, it's mostly a matter of creating and populating tags. You can even utilize the find and replace function to update recurring tag references.
One thing to note is that timers may require an additional operand when pasted. However, this can be easily rectified by double-clicking on the affected branch and making a few adjustments to the mnemonics. While experimenting with a SLC program, I discovered that converting OSR to ONS may require some fine-tuning, and SCP does not have a direct equivalent. Despite there being more nuances to consider, the key takeaway from this discussion is that copying and pasting from Logix can expedite the conversion process without the drawbacks of using conversion tools.
the_msp inquired about firsthand experiences with Phoenix Contact AxioLine Remote IO, whether Ethernet/IP or ModbusTCP. Their product line includes PT terminals, distribution, and relays with a push-in design. One user switched from Point I/O due to cost and found the AxioLine Remote IO to be functional but not preferred. During commissioning at a plant, they encountered challenges with the setup being cumbersome, poorly translated, and unintuitive. Additionally, a wiring error led to permanently damaging analog input modules, prompting concerns about their suitability for industrial use.
Rockwell products are currently expensive. Schneider offers the M340 and M580 with adapters for easy integration of SLCs I/O plugs onto their cards, eliminating the need for rewiring. This solution is more organized than using a conversion chassis. Schneider also provides a code conversion tool or the option to rewrite the code in Control Expert. Feel free to reach out for more information.
OkiePC expressed frustration with the Productivity Series starting array indices and bit numbers at 1 instead of 0, leading to errors when tying bit numbers to Ignition alarm tags. The P2K hardware has proven unreliable in their experience, with multiple I/O card failures across their devices. They find the Click or Click Plus to be hardier options, as they have had better success with them in the field. While they appreciate the newer 5069 platform, they are hesitant to fully replace a 10-slot SLC with a Click. They suggest that PSuite should consider offering a zero-based addressing option to address this issue.
Additionally, OkiePC notes a decline in customer support experience with AD, as they act as a buffer between customers and engineers, causing delays in resolving technical issues. They have encountered runtime transfer issues with the Productivity series, leading to reluctance in updating systems. The lack of good code re-use options and increased development time has also influenced their decision to move away from the Productivity Series as their standard choice.
Durallymax expressed concerns about issues and prolonged development time caused by the lack of code reusability options, leading them to seek alternative standards. What standard do you prefer, such as BRX/Do-More?
joseph_e2 asked: What is your standard platform - BRX/Do-More or something else? I mainly use Codesys and Wago hardware in my projects.
Take advantage of the chance to switch to PC-based control systems. Beckhoff offers TwinCAT 3, a reliable solution that will revolutionize your operations. Once you make the switch, you'll never want to go back to your old setup.
The Rockwell L8 series has been thoroughly covered thus far, but one drawback worth mentioning is the lack of a replaceable battery or capacitor for storing programs in case of a power loss. Unlike its predecessors, the L6 with its replaceable battery and the L7 with a replaceable capacitor unit, the L8 models do not have either. According to Rockwell, the built-in "capacitor energy storage module" in the L8s is estimated to last around 10 years before needing a complete card replacement. While it may be possible to have it rebuilt, pricing information is not readily available.
It is worth noting that once a program is converted from an L6 or L7 to an L8 .acd file, it cannot be reverted back due to changes in coding caused by the built-in ethernet port. However, this should not be a significant issue as the benefits of the L8 series, such as the built-in ethernet and USB ports, outweigh this downfall. Despite these drawbacks, the L8 models continue to be highly reliable and worth using, with no reported issues in functionality.
I would recommend installing a Siemens S7-1500 PLC in ET200SP with IM 255 modules, along with either a comfort panel or the newer Unified panels. While I initially disliked the Unified panels, I have come to appreciate their functionality. Siemens or a distributor can assist with the software conversion from Allen Bradley equipment, including the PanelView. While the conversion may not be perfect, it does streamline the process and only requires some tidying up and adjustments to names and IO configurations. Although the PanelView conversion may require additional work, it is still preferable to starting from scratch with commissioning and troubleshooting.
Learning to love a job is possible if it provides financial stability. Many individuals adapt to their circumstances and responsibilities to ensure their survival. In my case, I might have to work with a Micro800, which feels like a consequence of past missteps without adequate redemption. Having endured challenges with a 1769 and 800PV component in the past, I find myself facing a similar situation now. It's a reminder to always strive for growth and learning. (Keywords: job satisfaction, financial stability, personal growth, overcoming challenges)
After noticing how quickly L553 stock items sell out, I understand the demand for them. However, it's not worthwhile for me to dismantle them for parts. I will need to find another one within the next few weeks. I will be in touch with you soon.
One common critique of the Productivity Series is that it uses array indices and bit numbers that start at 1 instead of 0. However, despite this issue, some users have found success in replacing older SLC racks with the newer 5069 platform. While there may be faster options available, the Productivity Series is known for its robustness and reliability.
Robertmee pointed out that the old TI/Siemens 500/505 had a unique feature of being both 1 to 16 and having reverse MSB/LSB encoding. This meant that an integer value of 1 corresponded to bit 16. This interesting characteristic sets it apart from other PLCs.