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I am working on resolving issue in Press Machine where previous engineer has developed logic as per attached file. the atatched screen of HMI can only access by Engineer and only Engineer can set value of SPM (Stroke per minute). Once switch is set on the SPM of any job can not go beyond set value. The issue I am facing it when we power cycle, the switch get off and the register D2842 get SPM back to normal (set as per the die data) not by eng. How I can hold that data after Cycle power?  

 I've always had this Allen-Bradley memory map taped on my wall in my office. It used to be handy to use, until I remembered al of the prefix letters for each data type. Now I am using Emerson (GE) the old proficy software now called PAC ME machine edition. Now I'm finding it's about impossible to find the data type list amongst the thousands of help files, videos, ect... it seems like a simple thing to find, but I'm not having any luck. They use I and Q for regular inputs & Outputs, but there are R files, M files, S files, N files, G files, ect.... this is old-school PLC software that doesn't use tag names.   Is there a steadfast rule for each type, or can they be used for any type of data? Dazed and confused...  

hello everyone, I want to ask this setting. If I check this check box, what will happen to the program that I input into the HMI? can someone give me examples for not allow upload and not allow decompile?

Hello Experts Can someone please tell me if Communicating software for Siemens Logo PLC is downloadable? Regards

Hi All, I need access to a the Safety function blocks within a safety CPU using sysmac studio on a machine we are upgrading.. Is there a generic password available to gain access? Best Regards, Paul  

Ok I'll try a different angle of attack. I have acquired an S7-1212c unit. It is just too new for my TIA portal, which is V 15.1 The new PLC I have has firmwear 4.5 the TIA portal I have only supports 4.3, I get some errors regarding synconization etc. and it's like there are some tins that don't work. how do I update the TIA portal to the correct firmware I've tried updating the HSP files but it doesn't change anything https://support.industry.siemens.com/cs/document/54163658/how-do-you-update-the-hardware-catalog-in-tia-portal-?dti=0&lc=en-DE

Dear reader, I am writing a C# program using the library  ‘EasyModbus’ that needs to communicate with Siemens WinCC via the connection type ‘Modicon modbus’ I have written a version using the ‘float’ data type in WinCC and that works perfectly. Here my code fragment: Method to convert ‘double’ to bytes in C#: public static byte[] DoubleToModbusFloat(double value) {     byte[] bytes = new byte[4];     float floatValue = (float)value;     int intValue = BitConverter.ToInt32(BitConverter.GetBytes(floatValue), 0);     bytes[0] = (byte)(intValue >> 24);     bytes[1] = (byte)(intValue >> 16);     bytes[2] = (byte)(intValue >> 8);     bytes[3] = (byte)intValue;     return bytes; } Call of the method and loading of the modbus registers in EasyModbus: Bytes = PublicCode.DoubleToModbusFloat(TmpDbl); int n = (int)ModbusStartAddress + ((i - 1) * 2); mb.ModServer.holdingRegisters[n + 1] = (short)((Bytes[0] << 8) + Bytes[1]); mb.ModServer.holdingRegisters[n + 2] = (short)((Bytes[2] << 8) + Bytes[3]); So far so good – this works fine. But I also want to be able to use the ‘Double’ data type in WinCC because I sometimes need more precision than the 7 figures of the ‘float’. I thought it would simply be a case of doubling up the code so I wrote: Method to convert ‘double’ to bytes in C#: public static byte[] DoubleToModbusDouble(double value) {     byte[] bytes = new byte[8];     long intValue = BitConverter.ToInt64(BitConverter.GetBytes(value), 0);     bytes[0] = (byte)((intValue >> 56) & 0xff);     bytes[1] = (byte)((intValue >> 48) & 0xff);     bytes[2] = (byte)((intValue >> 40) & 0xff);     bytes[3] = (byte)((intValue >> 32) & 0xff);     bytes[4] = (byte)((intValue >> 24) & 0xff);     bytes[5] = (byte)((intValue >> 16) & 0xff);     bytes[6] = (byte)((intValue >> 8) & 0xff);     bytes[7] = (byte)(intValue & 0xff);     return bytes; } Call of method and loading of the modbus registers in EasyModbus: Bytes = PublicCode.DoubleToModbusDouble(TmpDbl); int n = (int)ModbusStartAddress + ((i - 1) * 4); mb.ModServer.holdingRegisters[n + 1] = (short)((Bytes[0] << 8) + Bytes[1]); mb.ModServer.holdingRegisters[n + 2] = (short)((Bytes[2] << 8) + Bytes[3]); mb.ModServer.holdingRegisters[n + 3] = (short)((Bytes[4] << 8) + Bytes[5]); mb.ModServer.holdingRegisters[n + 4] = (short)((Bytes[6] << 8) + Bytes[7]); However, this code does not work correctly. I have tried all combinations of byte and word reversal, and whatever I do WinCC either displays nonsensical values or ‘####’ showing that it cannot display the value. I have tried reading as much documentation as I can but it still looks to me as if I am doing the right thing. Also, I have downloaded a number of ‘modbus master’ code examples, and they seem to be able to read the ‘Double’ from my program without any issues. In WinCC I also see that there are two types of double – ‘Double’ and ‘+/- Double’ – I am also unsure as to why this is – there is no ‘+/- Float’ data type, which seems inconsistent to me. I am obviously missing something, but cannot seem to discover what exactly. I hope that someone can point me in the right direction as to what I am doing wrong. Please see attached word file for a picture of the configuration of the connection in WinCC.   Thanks in advance for any help !, Dave Long Double trouble.docx

Dear Experts We have a machine with Allen Bradley Micrologix 1400 PLC, Panel View C400 Request to share communicating software and cable details please  Regards

Hi, data registers are getting full, because of extremely high speed pulsing is there any way , if the data value in register goes above the capacity of 32 bit register, it automatically attaches itself to next set of data registers so lets say if data was written in D10,D11 Upon reaching the limit, it goes to D10, D11, D12, D13 please share if there is an alternate way to do this

Hi, data registers are getting full, because of extremely high speed pulsing is there any way , if the data value in register goes above the capacity of 32 bit register, it automatically attaches itself to next set of data registers so lets say if data was written in D10,D11 Upon reaching the limit, it goes to D10, D11, D12, D13 please share if there is an alternate way to do this

Hi, I'm Jovel, I'm new to learning how to program PLC. Just want to learn how to use Omron Sysmac Studio . I have a question about the Data Type Data Type - Structure ( Offset Type - Offset Byte )  / Union   I Don't Understand this 2 Data types and how going to use them, can anyone teach me and have a sample program? Thank you

Hello there, I am new to the forum and had a question regarding a setting in Sysmac Studio.   In the Basic Settings for my NJ301 there is a setting on this particular line that is set differently than the other lines I have worked on. This setting is called "System service execution time ratio". On all the other lines I have worked on it was set to 10%, on this line it's 25%. This line also seems to have the most issues with controller performance out of all the lines I have worked on despite having less complexity. I was wondering if anyone knew what this setting actually does and if it should be changed.   Thank you.  

Hi all, I'm not shure if I saw it once, a Spanish site with a rugged I/O shield for an arduino plus a software package to build an Arduino-PLC packet. It was pretty much $$$ raised... (on my oppinion, for my application, not to dispretiate their value). Has anyone thought of it or knows of such an ensemble: A general Arduino board, a general kind of "plc-shield" (some inputs, some outputs,...) and finally, a (preferably open-source) software package to make an off-the-shelf Arduino-PLC ish? Maybe it all exists with some name changes, or this question is of a huge ammount of ignorance. Thanks. Corvo (means Raven) 

Hi All I am trying to connect Cognex OPC Server with Mircrosoft SQL Server (SMSS). Do you have any idea how to do that? I couldn't find relevant information online.

Hi everybody! Recently I've got problem with installation of GXW3 on my PC There is a message "Any of the MELSOFT products or other software may not be installed normally. Please restart computer before installing this product" during installation. Of course I restarted PC)), delete all Melsoft products from my PC,  please i need your Help here ver 2.7 IQWORKS  I have Windows 10 64bit .  

Hello, I have a problem that I need to solve in a PLC program has it's projectlib locked.  I work for a company that contracted a PLC programmer before my time to program their new version of their control cabinets. The company did not write any specific contract with the contractor and just relied on his work. The guy later delevered a buggy software that is kind of functional (the bugs came up at the commissioning after the guy was paid and now he refuses to help or to provide more consultations). I have as a task to freshen this up and make it work without bugs, the problem is that the Projectlib is locked and I cannot access the source code.  The only thing that I can changes that I can make to the code is to put some logical circuits between the I/O of the already existing function blocks, which solved some problems, but not all and it keeps one of the most important ones as well. Anyways, that's my story, so now my question is, is there and possible way of unlocking the projectlib? Any feedback would be highly appreciated. Thanks in advace!

Hi, can anyone help me please. Newbie to plc and bought a mitsubishi and was told off the ebay seller that gx programmer is free to download? I looked on mitsubishi and coukd not find it? Does anyone have a link they could help me with pls. Regards  Andrew 

I am facing the error while compiling the program , there is only 1 error , but not able to figure what is the actual error. Please suggest and support.

I have an old Panelview 800 in a system that consists of the PV, a Micro 850 and 10 Powerflex VFd's running conveyor motors. My problems started when one of the motors would not run. It seemed that the PLC was not sending the Run command or the Speed. The problem got worse as I was working on it when two others did the same thing. The current situation is that 8 of the VFD's are getting a Run command and 2 are getting a flickering command. All 10 are getting a 0.0Hz speed command. I connected to the equipment with my laptop and looked at the PLC program and the PV program. I found that in the PV program that all of the user input data, which consists of Motor Speed (Hz), Accel and Decel times and some other timer values for the timing of some conveyor starts and stops, where all gone, set at '0'. this equipment is several years old and predates my presence here. The PLC program seems to be running and passing the commands that it receives to the VFD's. The data is passed to the PLC via Global Variables. I've never encountered this particular problem before. Any ideas?

Hi, I have a problem with Omron PLC and Beckhoff IO. The IO just disconnects in a few minutes and comes back! I received different errors: Link off error, Illegal slave disconnection, process data reception timeout. When I also check "Display Diagnosis/Statistics information" I see errors on all ports A and B of all nodes.  I have called and talked to both Beckhoff and Omron.  I have two NX1 and one NJ101 to test. And I have three EP2318-0001. I have the same problem with all the PLCs and EP boxes. It does not matter if I have one, two, or three nodes. I have tried different revisions of the EP2xxx from the XML file, different settings for the slave, different task periods, and the error still is persisting.

Currently have NX PLC setup as an OPC UA server and an OPC client setup and communicating.  The issue is only tags that do not have a Data Type are showing up in the OPC client.  I have 2 separate OPC softwares connected to this plc through OPC UA and both are having same issue.  If I setup the OPC as a polling service, then all the tags show up as expected.  Does anyone know if this is a known issue with Omron and their OPC UA server, or is there something that I am doing incorrectly (possibly a setting within Omron that I am not aware of)?

Does anyone have experience with the NE1A-SCUP02-EIP safety PLC? We had a machine shutdown yesterday with a L9n4 error on the NE1A unit. The manual says this is a tag data link error. Does this cause the safety PLC itself to shutdown? I always thought the EIP portion of the safety PLC was only used for status reporting to the PLC. The safety portion is strictly on DeviceNet and is independent of the EIP network.  The CJ2 PLC's error log tells me it had problems communicating with the safety PLC, the VFD, and NX I/O's which were all in the same panel going through an Ethernet switch. 

Hi, I have quite a noobie question. I want to create a function block to do some simple operations on 2 variables. Both variables are In/Outs (see picture attached). How can I make this function accept variables regardless of the data type? Given these is just simple math I am able to use the same instructions in REAL, INT, UINT, etc. But, the function block only lets me assign one Data Type to the In/Out variables.

Hello, What would be the best data logger for Backhoff automation based automation? Idea is to record some analog and digital tags at certain time intervals. Present them in tabular as well as graphical form and print some reports based on selected time window. I have looked up TwinCAT Analytics and that seems to be one option. But want to check others before making decision.

Hi guys    I am having trouble installing GX works 2 software. The software is fully legit and came with 2 license keys the first one I put on work laptop and second on my personal laptop. The install all goes fine but when i try open up GX  Works 2 I get this message from the attached image. I have plenty of room on my pc and even have other PLC from different manufacturers on it without issue but the GX Works is just giving me grief and I have tried to increase data on MY laptop and other windows fixes but still get this message when I try open it.  Has anyone else encountered this problem before or any ideas?   Cheers guys