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I have just started programming PLC's and the first thing I have came up against is a 4-20ma signal to a analog card for a Turbidity meter. The problem I am having is the reading is very erratic. Is there any way to get it from jumping around so much?

Hi All, We have a 4X Rx3i PLCs that use Ethernet Global Data (EGD) to talk to each other. At the moment we a facing EDG communication fault being generated and it trips the entire pumps What the likely causes of EDG faults: We have replaced PLC Ethernet Interface Modules-no fix We have tested the fiber optic cable-the readings show its OK Also,can someone explain what PLC heartbeat is?

Dear Friends; Good day. First i install the windows  virtual xp mode on Windows 7 64 bit. After installation i installed the FTM, RSLINK,and rslogix 5.0 in virtual xp mode.  Then i activate the software by Factory talk manager and select the hard disk and for a single computer activation. This process successfully acomplished. But when i open the RSLOGIX it shows popup that activation path is not found. Then i again open the factory talk tool and note that there is no activation shows in current activate products, But the activation detail shows in the RE host tab. I re hosted the activation by using go to Rockwell site and message show successfully activation re hosted.   *** Now i am stuck here is i loss my activation?  *** in windows xp virtual mode how i activate my product that application find the correct path of activation file? ** In windows xp mode if i open my Computer there is shows other hard drive partition as well as Local disk C:\  and activation file save in virtual drive instead of real C drive in windows 7. But there is no file path option to save the activation. Its by default save on C:\documents and setting\all user\shared documents\rockwell\activation\*****   Please help me how i activate my product in windows XP mode successfully?  Thanking you. i will remain Regards  

Need a little help here - I am trying to re-purpose some old hardware.  I have 2 old SLC5/04 B processors (+15 yrs?), that are giving me the same problem.  After a power cycle, they boot to a solid fault light - no comms.  Cycling the keyswitch has no effect.  Popping the processor from the rack and reseating it, powers up in a default state - it will not reload automatically from the EEPROM (when I establish comms, I can reload from the EEPROM or download the program from RSLogix).  I can't read the processor fault.  The battery is good.  The rack was scavenged, I have no idea its history.  Also in the 4-slot rack are DI, DO and RIO Scanner cards. I would consider my self a competent programmer, but no A-B expert.  Any ideas here would be appreciated.

HI, there. I am new to the Honeywell PLC, usually dealing with AB or Omron. Need some help from the Honeywell PLC gurus, my the only one PLC IPC620-1536 , suddenly stop working. No "Run" light or any outputs are present. Turning the "Mode Key" to the "program mode" and back to the "run mode" doesn't make any difference. I attached couple photo. My question, is any other way to start PLC running again? If I purchase the Win.Loader and communication cable and connect to the PLC, can I change PLC back to "Run" mode and upload the program, or fail to change the Mode using the Key. means the same fail using the software? Please update. Thanks for advance, 

Im having some trouble with a PLC and looking for a some help. Whats happening is output number 3 is stuck on. I thought maybe it was just the PLC. I pulled the program tried it on a new PLC with no luck. I checked for faults and the handheld shows no major faults. The output that is stuck on is for a door, its telling it that the door is open. Any help would be great.

Hi! I have my 1756 IF8 wired in high speed differential mode but i can't configure the RTS smaller than 11 ms. What I understand it should be possible to set as low as 5 ms if module filter setting is 1000 Hz. Is there anything else that i have to do?

Hi, I keep getting an error that project is in binary mode and plc is in BCD mode.  Wont let me change either. I must be trying in the wrong place...please point me to where i can change this in the PLC.   I am getting an error in my RXDU with a Honeywell barcode reader, on one machine, I am thinking it is related.   thanks for any help. 

I have a micrologix 1200 series module which goes on fault mode after providing it in run mode and it shows an error of 81h whenever i clear the fault nd go to run mode i get faulted again. Please help guys  

S7-300 CPU is in STOP due to a Profibus failure. We have a facility with a Profibus master CPU and multiple modules with Profibus interface and when we insert the memory card with the CPU program does not change to RUN, it stays in STOP. Read more:  http://www.tecnoplc.com/fallo-profibus-cpu-stop/   Greetings. _________________________________________ PLC programming and HMI http://www.tecnoplc.com

I hope to be able to provide more information, but for now this is what I have. I have a SLC5/05 that faults whenever a graphic display is pulled up from a Cimplicity HMI. So, the PLC is not faulted while all harnesses are connected to the I/O modules, and while the Ethernet cable is plugged in, but it appears to fault when a corresponding graphic is called up that includes tags from the particular processor. There are two PLCs on the network, and I am not certain if they share data between each other or not, or if the data is just being shared to a common Cimplicity HMI. Another strange thing is that one of the PLCs on the network is using a MSG instruction to pull data from what appears to be the PLC that continues to fault, but the IP address configured in the MSG instruction does not match.

Hi, I have a ControlLogix L63 processor. We had a power outage the other day and the PLC went into Major Fault (Type 6, Code1). It is quite easy to find out what these mean (from vendor manual). However the major fault was reset before i looked at it, so i couldnt find any specific details on what routine faulted. There is GSV instruction in the fault handler to get the details of the Major Fault (MAJORFAULTRECORD). This recorded the TimeHigh, TimeLow, Code, Type and Info. I am now trying to determine what the date in the ".info" records mean (8 registers). I cant find this in any manual. Can someone help?

Hi guys! Im new in using PLC and im using CPM1A, is there a way setup the plc to run mode immediately after rebooting it, also even without connecting it to PC or handheld device? I saw in the manual "Startup Operating Module" but i am lost, i dont know how to configure it. Thanks for your advice.

PAROCK1 for HMI/SCADA View File Now a software solution is available for your Modbus (MB) needs in Rockwell/Allen-Bradley Control Logix or Compact Logix (Clgx) family processors, instead of a traditional 3rd party hardware like Prosoft MVI-56, Molex SST-SR4-CLX-RLL etc.  It is an Add-on instruction (AOI) for PLC/PAC firmware v16 or later, (other solutions are available for pre v16 systems).  For hardware interface, use PLC’s channel 0 (serial) or TCP/IP Interface module(s) to have as many MB TCP/IP devices or serial devices.  (Some limits apply based on system configurations, Comm. settings depending on HW used.) Connect any MB Client/Master or Server/Slave device(s) to your CLgx PLC, including flow computers, analyzers, VFDs, Power Monitors, Level gauges, Smart I/O, etc.  All the MB public/native function codes are supported.  32-Bit integers/floats as single entity are supported with byte and word level swapping. A separate utility automates the data mapping to your PLC logic.  Features -Serial Master (BASIC required Option); TCP; Slave; Redundancy; More than 5000 accumulative registers; MB CFC (Custom/Private Function Code) Support; Data mapping too – Between PAROCK1 & your PLC logic; Packaged with Rockwell; TCP/IP Interface Module; Volume Discounts; Annual Support Requirements -Rockwell/AB-CLgx processor with v16 or later.  Contact PCI for earlier versions. -If using CPU’s Chan0, you cannot use Chan0 for any other user mode activity. You can use it for non-user mode activities -TCP/IP Interface Modules from Rockwell/AB supported, are: -1756-EN2xx ControlLogix® Ethernet/IP communication modules, firmware revision 5.007 or later -1756-EWEB ControlLogix Ethernet/IP web server module, firmware revision 4.006 or later -1768-EWEB CompactLogix Ethernet/IP web server module, firmware revision 1.002 or later -1769-L30ER, 1769-L30ERM, 1769-L30ER-NSE, 1769-L33ER, 1769-L33ERM, and 1769-L36ERM CompactLogix controllers, firmware revision 20.011 or later -1769-L24ER-QB1B, 1769-L24ER-QBFC1B, 1769-L27ERM-QBFC1B CompactLogix controllers, firmware revision 20.011 or later -1769-L16ER, 1769-L18ER, 1769-L18ERM CompactLogix controllers, firmware revision 20.011 or later Other Related Services/Items -Custom PLC Add-on instructions building -PLC upgrades, troubleshooting, applications -PC Windows, iOS5, Linux, Mobile devices Comm. Drivers -Custom development, Technology Transfer Services  -Other Non-AB communication drivers for serial or TCP  -Full control system integration, training, architecture design This driver can be conviniently used with Visual Studio in development of complete large scale complex HMI/SCADA Systems. It can be used to perform advanced reporting MES, analytics, IoT, Big data type apps. One example is available to download here For More Info Overview of Parijat Drivers: Click here  Additional supporting Info about Parijat Drivers:Click here Complete Related Driver options: Click here     Submitter Scadadoctor Submitted 03/10/16 Category Other PLC Demo Software

First post. We recently upgraded our machine from an SLC to compactlogix. In the SLC 5/05 we used analog 1746-ni8 cards for pressure and position sensors. When we moved over to the compactlogix 1769 l36erm with 1769-if16c cards we seen issues where the analog values had very little definition accuracy. This can be resolved by changing the filters but then the response time of the card is to slow and we miss data. All of the relevant code from these sensors are in their own task and ive tried periodic, event and continous tasks but none of this helps. The strange thing is with the SLC we never seen these issues. Any ideas how i can improve the reponse time when the filters are set low?

Hello, I hope you are all having a great Wednesday.  So I was wondering if this is possible, and if so, how to do it.  What I'm trying to do is get a real time speed of my hydraulic cylinder using a transducer, a 1769-HSC high speed counter module, and a 1769-L36ERM processor.  Kind of like a speedometer in my car.  I would like the number in inches/ second.   We use a hydraulic proportional valve to control a cylinder that we use to pump molten lead into our die cast machines.  Back in the day they used to use limit switched that rest on a tail rod attached to the cylinder shaft to get an approximate stroke length.  It was very crude, but it worked for what it was.  I'll explain  a little more, in case I'm not explaining it very clearly.   So on most of our machines the maximum stroke length of a normal shot is about 11".  We have different "stages" to the shot.  Stage one is typically from 0" (when the shot is all the way returned) until about 1.5", at 1.5" the valve stops and there is a shot delay for 1 second (vacuum draws some lead into the goose neck and into the beginning of the mold), after the delay second stage starts, second stage is from 1.5" to 4", third stage is from 4" to 8" and fourth stage is from 8" to 11.5" or until the shot timer finishes timing, and then another valve switches, and the shot starts it's return.  We have the different stages because we typically shoot the cylinder slower at first, and then delay and then almost maximum velocity.  We control the velocity with an analog output to a solenoid on a hydraulic valve.  For example, for the first stage we may open it up 20%, then 0% during the delay and then 85% during second, third and fourth.  Sometimes we play around with different shot delay times, different shot velocities, sometimes 3rd may be faster than 4th, ect, to get the best die casted parts.   Anyways, so in the past they would use limit switches.  One was a button head style that when the shot cylinder shaft was all the way returned, it made the switch, and we knew the shot was fully returned.  One was set at 1.5", 4", 8" etc.  They all, except for the shot return switch, were roller style limit switches.  They were all made, and once the shot reached that stroke length, they would come off the rod and we would know we were in that next stage.  So it was very crude.  If you wanted to adjust the stages you would have to climb up on top of the very hot molten lead pot, mark where the limit switch currently was (in case you needed to put it back) loosen the bracket, try to make a measurement and guess how far you moved it.  It was crude to say the least.  Some of our older style machines that don't need much tweaking still use the limit switch style positioning system.   Most of our new machines all use a VisiTrak transducer.  The shot cylinder rod that is attached to the cylinder shaft is actually threaded and then has a very thing layer of chrome plating.  The transducer sits against the shaft and counts the threads.  It transfers those counts to a Very High Speed Counter module in our PLC I/O rack.  We have a CompactLogix L36ERM processor and we use a 1769-HSC as the VHS Counter.  Then we just do some math in the PLC program and we are able to get shot stroke in inches.  We set different compare instructions, for example when: Shot_Stroke is greater than or equal to 0 AND Shot_Stroke is less than or equal to 1.5 then 1st_Stage_Bit is active.  We set up different numbers for all the different stages and still use the button head limit switch as a second method to confirm that the stroke is fully returned.   The counter is very fast.  We are able to know what the shaft stroke is at any given point.  We currently do some math using the distance of each stage and using timers to calculate inches per second of each stage.  That way we can have a nice Speed number in inches/second that we can use to make different adjustments to the shot.  Typically the first stage is about 7"/second second is: 24"/second third is: 42"/second and fourth is 2"/second.  But I want a real-time, current speed, not just the speed that it traveled through each of the stages.     Ok, after all of that explaining, I'm finally getting to my question.  How would I logically write a set of instructions that could give me current speed in inches per second.  Like i said, I am able to calculate the speed of each stage, after the shot has completed the stage, I just divide the distance of the stage (in inches) by the time it took to travel through that stage (in seconds).  But I would like to have a real time speed, kind of like a speedometer on a car.  Is this possible?  I know that the scan time on this processor is very fast and the high speed counter module counts very fast as well.  How do I do the math to get a real time speed in inches/ second?   Sorry for the very long post.  I just thought i would give you a background on what we are doing/ would like to do.     Thank you very much.

Hello, I am trying to get a Fanuc R-30iB controller added into my RSLogix program. The PLC is a CompactLogix 1769-L30ER When I search for new modules to add I see a pre setup Fanuc Robot Ethernet module, but I can't get that to work. I tried following Fanuc's instructions and setting it up as a generic ethernet module, but I couldn't get that to work either, it just says i/o not responding for that module. I am definitely able to ping the Fanuc controller, so I believe I am seeing it. When I add the controller in RSLinx, it's there, but there is no icon next to it's name. I'm guessing because its a fairly new controller, and it came out after the version of RSLinx that I'm using? Don't I need to download the EDS file for the new controller so that Linx can recognize it? Any help would be greatly appreciated. Thanks

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Dear All I have a PLC and a 1769-SM2 so the red led is Steady Red. in manual wroted about this error : Cause:The module is unable to establish communication with the controller. Corrective Action: Cycle power to the controller. now I want know what it means to Cycle power to the controller? means is I power off the controller and then power on it? if it is I do it and the problem exist. could you help me on this issue? Best Regards 1769-SM2.pdf

Hey, this may be an obvious question, but here goes: I have a CompactLogix L36ERM running RL5000 controlling one of our lead die cast machines. When I make a change to the program offline and need to download I always go and shut the machine down for safety reasons before downloading. One of our techs stopped the machine but left the control power and hydraulic pump on while downloading (something we are not supposed to do) when he finished downloading he switched it back to run mode and the machine closed on it's own and started right back up. This is a safety concern to me. We have a "close enable" tag that is true when all necessary conditions are met, and gets latched on when the machine is running in full auto. Before he downloaded the machine was at idle, meaning that the only way to close the machine would be to press the two dead-man switches to start the process. But, when he downloaded it started up automatically. Now I know the reason why is when the program was last saved, the "close enable" tag had a value of 1, it was latched on, so it bypassed the dead-man switches. A quick fix would be to save the program with that tag un-latched so that it can't start up on it's own after downloading. But, in case somebody saves the program while the machine is running and with that tag latched on, I need a better solution. Is there any tag or bit that goes true when a program is downloaded or when the mode of the PLC is switched from run to download to run? I want to manipulate that tag so that when I download it un-latches the "close enable" tag. I'm sure there is a way to do it, I'm just not even really sure what to search for in the online help. Any help is greatly appreciated. Thanks Howard

Hi, I have S7 300 CPU all its leds falshing in same frequency this happen while it running and can't access to it online if we make power reset and selctor on stop it start normal and when try to go online all leds flash if we make power reset and the selctor in run position it start and after a few second start flashing can any one advice me what i do ? what is the possible causes of that

Hi all. I currently have a scenario where I connect with a SCADA (OPC using virtual com port) to an Controller (A-series) via E300 HMI using transparent mode. This setup works fine, no problems. I have now upgraded the E300 to the E1032 HMI with all the same settings, except the E300 was using an expansion Ethernet card and the E1032 is using the built-in Ethernet port. Now with the E1032 in place the SCADA (OPC) just cannot get healthy comms to the A series PLC. Am I missing something somewhere?

Hi all, I am using compact logix 5370 L3 controller(1769-L30ER) in hydro power plant application. So I have to now fetch electrical parameters from different brand component i.e. Siemens make General Management Relay which has profinet communication support. So the question now, is it possible to communicate directly with the controller and Siemens relay to display various electrical parameters? If not please suggest me what I can do to communicate with the relay in order to display the parameters in HMI. Awaiting for the replies. Thank you.

Hi im quite new to Siemens programing. I got a issue that iwe been stuck with for a while now when im programing in Graph. When a supervision_fault happens the sequence is locked until I press ACK_EF and the transition is fullfilled. Then the sequence continues right on. What I want is that if ACK_EF is pressed the supervision fault will be cleared and the sequence remains paused until I press "Startbutton" again. I´ve tried Halt_SQ when the FAULT is triggered but I cant seem to get the FAULT down when I ACK. Also tried to switching it over to manual then ACK the fault. But that didnt work for me either. Hope there is someone that could help me with this :) It would be much appreciated!