chantecler

Hi, I've seen the 1783-ETAP being used to insert devices with only one Ethernet port into a Ring network topology. Not sure but I think it can be used to insert a device that doesn't support time stamp protocol into a network running CIP with Time Stamping.  Bye

Hi, From here it's really difficult to figure out what's happening, I can only guess that when you have an emergency stop the drive de-energizes and losses its home reference and (maybe) that is why the next movement is to move the chain to its next stop in forward direction. Another possibility that I can think of is that the emergency stop resets a sequence, in this case you have to check your program logic.  

Does the servo-drive de-energize? losses power? How do you home your axis?

Hi, RS Emulate 500 does not emulate the High Speed Counter which is a special circuit inside the PLC that runs independently from the scan cycle. I've read it somewhere and I'm trying to find the official paper, I'll let you know when I find it. Bye

No, the file size difference is not software version related. I have noticed this differences for long time but since the compare tool shows no differences between files I have simply ignored them. I made this test: I copied a file from one location to another, edited it, made couple changes and reverted them (mostly bits from zero to one and back to zero), saved the file and got a saved file with a different size. I have always used RSLogix 500 V9.00.00 Finally I compared both files using the compare tool and the result showed no difference between both different sized files. Now, the reason why the software changes the file size when it saves it is not of my knowledge. My guess is that it has something to do with changes tracking.  

I'm supposing that you're not able to open the GUI because the RSLinx icon doesn't show in the taskbar in Windows 7. I suggest to make a copy of the shortcut, edit it and add the command line: /service in the Target field. It will look similar to: "C:\Program Files\Rockwell Software\RSLinx\RSLINX.EXE" /service Save it Use this new shortcut to launch RSLinx Now the icon will show in the taskbar and you'll be able to open the GUI while running as service. Hope this helps Bye  

  Suggestion: Try installing and running with administrator rights  

Hi, I just did some research for you. Encoder brand: FEMA (not Elcis) Model: XA59C12-50-824-B-B-CV-R-05 X: Custom options A: High temperature 59C: 59mm, hollow shaft, to be used on motors 12: 12mm (diameter) 50: 50 ppr 824: Power supply 8 - 24 Vdc (Can be supplied with 24V) B: Bidirectional - no Z channel B: Push-pull output (this is compatible with your module) CV: Cable R: Radial (in this case refers to the cable location) 05: 5m (cable length)  Bye  

  I think this will lead you in a good direction: http://www.prosoft-technology.com/Products/Gateways/EtherNet-IP/EtherNet-IP-to-Allen-Bradley-Remote-I-O-or-DH-Gateway http://www.plctalk.net/qanda/showthread.php?t=114670 Hope this helps   Bye

Hi man, I haven't used this module but reading in the 1746-HSCE2 user's manual 1746-um002_-en-p.pdf chapter 3 it says: "For a 12V dc encoder signal, use the 24V dc jumper setting" and in appendix A (specifications) you'll see that 12V is inside the input range but very close to the edge so you have to make sure the pulses from your encoder pass the on-state and off-state threshold levels. You haven't mention what model your encoder is. Make sure your encoder hardware and the module are compatible. Bye    

Hi, I have some questions for you: Does the drive have an HMI installed? Does it display a message like position error or something? How do you put the system back to work? Recycle power? Does the MAM instruction set the pc bit? error bit? What type of feedback device do you use, absolute or incremental? Is there a chance that coupling between the motor and the load slides?

  I just want to tell that this project materialized and the press has been working fine since startup about six months ago. I ended up programming two separate MOAC instructions. One I utilize to generate logic bits to synchronize the press with some functions like: servos sheet advance command, product control and die protection, and the press normal stop command. The second MAOC I utilize to drive two physical outputs of my 5069-OBF module, one pushes the product out of the tool and the other expulses the product from the die. The major problem I faced was how to make the MAOC instruction drive only two physical outputs. Originally I configured the MAOC as in knowledgebase topic 853576. I only wanted bits 4 and 5 of my output module to be driven by the instruction but I got all the other bits to go "false". I struggled with this problem for an hour but since I needed to finish all the programming in a very short time I decided to use a different approach and go back to this issue later on. The different approach was to configure the Module's Output Data as "Data" (not scheduled) and drive bits 4 and 5 from my press task. The press task was configured to run every 2 msec so I estimated that this would introduce an error of 2.4 degrees while running at 200 struck/min. Fortunately this turned out to be completely tolerable. I haven't gone back to this issue so far since I need production to stop and there is no hurry to do so. Finally my question:   Has anybody had this same issue with a 5069 CompactLogix?      Ideas? Thank you

Hi, My recommendation for you is to analyze the program and take advantage of the Task Monitor Tool to modify the program in order to avoid task overlapping which prevents tasks from executing all the code and is a source of erratic behavior. You should also reserve enough time for system overhead and reconfigure your CPU to utilize this time to serve either the continuous task (if there is one) or reserve this time for system tasks. The communication with your workstation will be served during this system overhead time. See: Knowledgebase topic 54182 and Programming Manual 1756-pm005_-en-p.pdf Most probably you will find that you can expand some task scan periods. I may be wrong but this seems to have been programmed by someone accustomed to program Siemens who didn't check the performance of this application deep enough. Bye  

Hi, Is there any way to disable the little preview window that shows up when you hover the mouse on a routine tab in logix designer? I think it appeared for the first time in RSLogix 5000 V17. I don't know if anybody else is annoyed by this windows but I certainly am. Thank you  

Hi, I’m writing a program to control a puncher press. Basically the machine has a motorized high inertia flywheel with an 842E-CM single turn encoder directly connected to it. The circular movement is linearized to move a die that punches a steel sheet as the sheet advances under the die. One punch for every flywheel turn. There are some machine functions that need to be activated and de-activated according to the flywheel position. I have to use the MAOC instruction due to high speed and high precision the process requires. My problem now is that one particular function has to turn on at 200 degrees (The encoder signal has been scaled to 360.0 degrees) pass the 360.0 or 0.0 degrees point and remain “on” till 10.0 degrees. So far I have not been able to find a way to do it. Can somebody help me with that?  

  I think you have to buy an 8 pin mini din extension cable and an 8 pin door mounted mini din connector and build the cable your own

  Hi, Doing some search on the internet I found that apparently the error is due to the fact that the version of RSLogix 500 that you are using cannot handle some part of the program (Data Files, Addressing or something else). If this is the case, the "solution" is to use a different version of RSLogix 500.  

Hi, The input assy object (to read information from the servo) corresponds in your program to: data file L208 words L208.0 to L208.15 for drive 192.168.2.8 and words L208.16 to L208.31 for drive 192.168.2.9 The output assy object (to write to the servo) corresponds in your program to: data file L210 words L210.0 to L210.12 for drive 192.168.2.8 and words L210.13 to L210.25 for drive 192.168.2.9 See attached example and tables explanation from rockwell You can find more information and manuals in the rockwell automation site under literature, sample code library and knowledgebase   K300 ML1400 EnetIP Example v1_0.zip

Hi, I apologize for my English, with a "picture of your program taken when the servo is faulted" I meant a copy of the program uploaded when the servo were faulted (not a photo). I am glad to help Hope we can work it out Bye  

Greetings and Welcome Updates: Not sure but I think they are not necessary. Software: Sure you can, it's called RSLogix 500 or a free version called RSLogix Micro Starter Lite which precisely supports ML1000  

Dear alplus, I am working on the problem but still unable to figure out what is happening. Please let me know if I am right or wrong. Your robot has two servos, one to move up and down and the other to go left and right. The homing sequence is being completed with success but when you turn the robot to auto it moves up correctly but then moves right instead of left. Am I right? It would be very helpful if you send  me the plc’s connections so that I see where the auto signal is connected and also another picture of your program taken when the servo is faulted so that I have the information that I need. Bye

Hi, Is the servo connected to the plc via ethernet cable? If this is the case please, post the plc program Is the servo being referenced by an analog signal? Is the servo being commanded by means of step and direction signals? If this is the case then check the direction signal Honestly I haven't worked with k300 but I may be able to help you if you send more information. The electric diagram may  be helpful also. bye

Hi, I do not see why you would like to use two different MAOC instructions pointing to the same module since you can schedule and compensate each output individually and every output can also be unlatched individually by position or time. The only limit is the number of outputs that your module can process. Probably I didn't understand your question and you would like to set different axis arm position and cam arm position for each instruction. Sometimes when I don't get an official answer to my questions, what I do is to test by myself. In this case for example, program two MAOC instructions that use the same integer as the output and see what happens. After that you may want to test your actual module. By the way, recently I programmed a punching press using this instruction and I had to perform many tests before being satisfied with the result. Bye  

Hi Dan, your wiring is correct assuming that the module's terminal 34 be connected to both the encoder pin T and the negative of your 24Vdc supply Bye   PS Excuse me for my intruding

Hi all, I'm kind of beginner regarding Siemens PLCs. I have to buy an interface that allows me to program and monitor an S7-300 plc with profibus interface. So far I have utilized a Helmholz NETLink® PRO Compact, PROFIBUS Ethernet gateway 700-884-mpi21. My question is: what other options are there? Thank you