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  1. Hello Everyone, I want to have a serial communication using Siemens S7-1200 with CM 1241 (RS-232) and communicate with my Arduino. Here is the setup of the communication. I have 2 temperature sensor and one Led connected to my Arduino, and on the PLC side I have S7-1200 from Siemens and CM-1241. Arduino and my PLC are connected just by using Tx and Rx pin no handshake is done. I am sending the temperature data from both the sensor to the PLC. on the PLC side i decide when to turn on the Led connected to my arduino depending on the different temperature values. I have assigning a ID to both the sensors before sending out the data. This is how the transmitted data from Arduino looks like $AOPT_TEMP1_20_TEMP2_21 . So far its good, I am receiving serial data on my PLC using RCV_PTP (received data are placed on the buffer) and sending data using SEND_PTP. I have also implement a filter on the PLC which will only accepts the serial data starting with '$AOPT_'. Now, I want to receive the temperature value from two temperature sensor TEMP1 & TEMP2 and then control the Led. For instance if (TEMP1>TEMP2 ) then turn ON the Led else turn OFF. I am able to receive the data on the PLC from Arduino but now I don't know how to proceed with comparing the received information. How do i extract the only required data from the received buffer? Any suggestions will be highly appreciated. Thanks in advance....
  2. Micrologix 1500 PLC tripping /stopping periodically with red led indication . It is showing error 679H It is also showing error on Analog Output Card which is at slot 6 . After clearing error it starts and stops again after some time . Requested to suggest me any solutions for eliminating the problem
  3. Hello I have a question about a Siemens Simoreg DC Master Drive. I am wanting to modify the register for status word 2 (r653). I cannot find how to define each of the bits in the status word. I am new to Siemens drives so any help would be appreciated. Thanks Will
  4. I have camera Keyence connected via ethernet to the S7-1200. In the cameras can be set about 30 "tools". Each "tool" perform a different function in the image. In what way in the program code on S7-1200 I can read eg Tool number 10? For example, if tool 10 is the correct I want to to value 1 on some tag for eg camera_tool1. Thank you in advance for any help. Regards Mikołaj
  5. Hi friends, Can anybody tell me when to use a local-Static variable and when to use a Local Temp variable whilst creating a Function-Block in S7 -1500 using TIA portal. Thanks for looking in. Best wishes.
  6. Good day to all, Please i need your support. I am new to world of Plc. I just bought a micrologix 1500(1764-24BWA) Plc for my training program. I have a question with respect to the Input terminal 24V DC. I connected L1,L2 and the ground at the Output terminal to a 230VAC and power On the Equipment, everything was okay. My question is do I still need to connect the -DC and + DC at the Input terminal to a 24VDC external power supply to get the needed 24VDC for the Input terminal or the 24VDC comes from the internal voltage conversion of the PLC. Once again thank you for the support. Best regards

  7. Sinamics G-120 Drive on Profinet

    rajsiyer posted a topic in Siemens

    Dear Friends, In my present project, I have a S7-1500 PLC & 3 Nos, Sinamics VFDs(PM-240s) with Profinet ports.(CU-240E -2PN) The drives and PLCs are on the same Profinet network. I wish to know the essentials of controlling the command and speed reference of these drives directly from the PLC on profinet. Reading the help in TIA portal got me nowhere its all about Telegrams and things that I haven't figured out yet Thanks for looking in; I shall greatly value all help and advice.
  8. Hi guys, I am a little new to TIA portal. My question is whether it is possible to create structures of data (UDTs) and use them without addresses in the program? Or is it absolutely necessary to assign base addresses to all variables? thanks for looking in & will greatly appreciate any help Raj S. Iyer

  9. FF Communication - Voltage drop

    joshi171 posted a topic in Siemens

    Hello everyone, I am working on foundation fieldbus protocol with PCS7. I am facing problem of voltage drop in successive AFDiS (Active Field Distributor). As part of the DCS hardware I am using CP443-5 EXT.-->FF Link (Redundant)-->FDC157-->AFDiS1-->AFDis2-->AFDiS3. The architecture is daisy chain not the loop. I have checked the current consumption using fieldbus calculator. But everything is fine as per calculation. Even I had tried connecting the AFDiS one by one and also with no load condition. I didn't find solution to this problem. I am attaching hereby the sheet of values which I obtained after connecting trunk and spur stepwise and measure voltage at each point. However when I am using AFD in combination with AFD, the amount of voltage drop is not that much significant. Please advise a possible solution. Thanks in Advance, Gaurav J

  10. Hi from new PCS7 user...

    Leem2209 posted a topic in Siemens

    Hey all. Just wanted to introduce myself, I'm mark and I'm employed as a process engineer in a plant in UK. I've been there 8 years now and achieved the process position through dedication and willingness to learn. Although my previous employment was as an aircraft electrical technician so I don't have the soundest PLC knowledge. Unfortunately, my more knowledgable colleagues have a tendency to enjoy keeping secrets and so I find myself thrust into this position with little guidance. So I'm going it alone! I'm trying to learn as much as I can myself. And decided this would be a place that I reach out for help as and when I need it. I've been able to monitor and use the software logic as a tool for fault finding and have implemented some modifications and new projects into the software we have on site. I've also done an intermediate course a few years ago on S7 so I am fairly capable with it. I lack knowledge on WinCC, and I am scraping my way round that when the need arises. We also don't have any test rigs available to play about on. Which I find a little frustrating. I welcome any advice people may have for me at this moment in time. I'm looking into doing some courses, a simple little course I found offers an NVQ L3 qualification for relatively little work and cost. But it's based on fundamentals of PLCs such as selecting the right PLC for a process, the limitations of PLCs, decimal to binary to hexadecimal conversions (I'm ok with that bit) and various other "fundamentals" of PLCs. I've kinda skipped this bit in training and not sure of the requirements for the course. If anyone has any advice on that, places to look, etc, then I'd appreciate it. Also any other recommended courses and reading. Cheers.... mark
  11. Hello, I have an annoying problem with communication between Siemens S7 PLC and HMI panel. Here it how it looks like: I am using Siemens S7-315 with 343 Lean ethernet port. This port is used to communication with HMI terminal. Communication is realized through S7-TCP communication protocol. When I was testing the communication in the office everything worked fine and nothing wrong happened. The problem occururs only on the installation. After turning the PLC and HMI on everyting works fine, data is transferred correctly and variables are displyed on HMI. After a few hours the communication is suddenly lost. This is a direct connection between PLC and HMI and there are no other devices in this network. So it is not possible that suddenly there is an address confilct. I made a wireshark analysis (I connected a notebook and hub into the network) and I found out that when the communication is lost HMI terminal is trying to get data from the PLC but it is not responding. It looks like PLC ethernet port is broken. You cannot ping PLC from notebook and HMI. On the other hand you can exchange pings between HMI and notebook. The communication is back again only if you'll restart the PLC. The strangest thing is that I did not have any problem with the communication when I was testing it in the office. The configuration and project of PLC and HMI is excactly the same. The only difference is that on the installation PLC is realizing also a communication throguh Profibus and MPI. I've tried to use different ethernet cables (crossed, non-crossed) but in all cases the situation is the same. Do you know waht can be the cause of such behavoiur? Maybe someone had a similar situaion? In the attachment I send a screenshot from Wireshark which shows the moment when the communication breaks.
  12. Dear all, I have implemented PID temperature control for mini heating tank system using Siemens S7-313-c2-DP PLC. Now, I want to plot the values of the "process value (temperature) " and "Setpoint" as a function of time in wincc flexible runtime. I am using wincc flexible 2008 advance SP3. However, the problem is that I have tried plotting the value of "process value" as a function of time using trendview, But the change in the value is not smooth i.e. it is in step manner. Besides, the value of temperature progresses towards the left side of the graph, but I want it in the right side. And also I would like to plot two values against time in one graph in smooth transition so that I can make the comparison and I want the plotting only on the right side of graph. So, how to do all these things? Since, I am a newbie to WinCC, I would appreciate your help. Thank you. Regards, Ankur Gajjar
  13. Hi there, I have trouble understanding the "mechanics" of STL programming language for Siemens S7-300 PLC. For instance I have a code which looks like this (taken from the Siemens manual for extended pulse timer): With regards to the first line, AND operator checks whether the state of I 2.0 is '1'. According to the "Bit Logic Instructions" manual, it also ANDs the test result with RLO. Now the question is - what RLO is it if there are no operations beforehand? What memory area does it use for that particular RLO? Moreover, what is the Boolean bit logic string in this case? I presume it is all the lines up to the '=' sign. The confusion is also caused by instructions (FR, L, T) which are not logical operations or RLO, although there is associated memory bit with them. I'd be grateful if you could clarify this matter? Many thanks!

  14. Daily logging of flow in WinCC

    Cyanogen281 posted a topic in Siemens

    Hello, I am working on a Siemens S7-300 PLC with a WinCC HMI and I am looking to perform logging of certain values every 12 or 24 hours. Basically I have a Flow meter that constantly has flow through it. Right now I have the PLC set up to record the current value of the flow, as well as a totalizer to indicate how much flow has gone through the valve. (until an operator chooses to reset it) I need to create some sort of logic or utilize something in WinCC to calculate the flow through the valve only for that day. After that day, the value will be either deleted or replaced with a new value the next day... If anyone has any tips or advice it would be greatly appreciated. Thank you,

  15. S7-1500 with TIA Portal

    native_zero_cool posted a topic in Siemens

    In this video you can see how TIA Portal works with Siemens S7-1500

  16. How to read digital input signal

    bonnyng posted a topic in Siemens

    Hello everyone, I am a freshman, studying about PLC. I work with S7-400 system. Please help me how to read digital input signal directly from humidity sensor using PLC. Thank you so much. Best regard!
  17. can anyone please provide me how to communicate between keithley controller 2182A(nano voltmeter) and any siemens plc.aslo the programme & instruction & parameters..ASAP using RS-232 interface?

  18. Lenze drive fault on proface

    robborsc posted a topic in Siemens

    Hi I am having a problem with an error/fault code. The fault comes from a lenze drive as an integer. We have a proface HMI monitoring a DBW in the siemens S7 300 that holds the lenze fault code. The PLC comes up with a generic code "lenze drive fault". The proface comes up with the drive code. I would like the PLC to produce a fault description using the lenze fault code in the DBW, instead of the generic one [listed above]. could anyone please help with this problem Thanks Robbo

  19. Version 3.11.5.0

    3821 downloads

    .NET class library for use in Visual Studio.NET to create HMI/SCADA apps that communicate with Siemens S7-200, S7-300, S7-400, S7-1200, & S7-1500 PLCs via Ethernet.   For .NET Framework 2.0 - 4.8 projects. Supports UDTs Does not require OPC, Siemens, or 3rd party drivers x86, x64, and Any CPU compatible Visual Studio.NET 2010, 2012, 2013, 2015, 2017, 2019, and 2022 compatible Most .NET targets are supported, including Web, Windows, console, and service apps Can be configured programmatically or visually Visually design your entire communications configuration without writing a single line of code Extremely high performance - 5~10 mSec typical transaction time Highly optimized to minimize communications transactions Tag database can be configured via code or visual designer Abstract base classes allow you to write generic code that works with all drivers Synchronous and asynchronous read/write methods Data change notifications Provides common user interface across all driver classes including A-B, GE, Modbus, etc. No limit on number of devices or data points Multi-threaded for high data throughput Includes extensive help system Example applications with VB and C# source code included. Easily connect to your factory floor systems. Immediate Internet delivery and online license activation. No runtime fees or keys for qualified applications  
  20. File Name: Siemens S7 Ethernet Driver for .NET File Submitter: Automated Solutions File Submitted: 21 Apr 2013 File Category: Demo Software .NET Component for use in Visual Studio.NET to create HMI/SCADA apps that communicate with Siemens S7-200, S7-300, S7-400, S7-1200, & S7-1500 PLCs via Ethernet. Supports UDTs Does not require OPC, Siemens, or 3rd party drivers x86, x64, and Any CPU compatible Visual Studio.NET 2005, 2008, 2010, 2012, and 2013 Compatible Most .NET targets are supported, including Web, Windows, console, and service apps. Can be configured programmatically or visually Visually design your entire communications configuration without writing a single line of code Extremely high performance - 5~10 mSec typical transaction time Highly optimized to minimize communications transactions Tag database can be configured via code or visual designer Abstract base classes allow you to write generic code that works with all drivers Synchronous and asynchronous read/write methods Data change notifications Provides common user interface across all driver classes including A-B, GE, Modbus, etc. No limit on number of devices or data points Multi-threaded for high data throughput Includes extensive help system Example applications with VB and C# source code included. Easily connect to your factory floor systems. Immediate Internet delivery and online license activation. No runtime fees or keys for qualified applications Click here to download this file