![clp siemens step 7 clp siemens step 7](https://docs.factoryio.com/tutorials/siemens/img/setting-up-s7-200-smart/step7-open-communications.png)
Hope this is helpful! Contact us for more information on our Siemens PLC Programming services. In fact, Siemens provides instructions for much more complicated communication protocols including blocks for configuring your port as Modbus master or slave, but that's a little beyond my simple example here.
CLP SIEMENS STEP 7 SERIAL
That's it! Serial communication is that simple. That's everything you need - send the data! To make things simple, I used the string length function block included in the extended instructions list to calculate the length of my string. In my case, I was broadcasting ASCII text to my slave display, so I wrote a quick function to convert a real to a string, concatenate it with my message header and terminator, and return the resulting string. Sending data is equally simple - just grab the SEND_PTP function block from the instruction set. I would suggest calling this block using the "FirstScan" bit (%M1.0) to make sure your settings are applied correctly every time the PLC starts. This will allow you to fully define your port configuration as needed. If you'd like to configure your port settings dynamically, no problem! There's a simple function block provided (on the instructions palette, located under Communication) called PORT_CFG. Again, you can do all of this directly from the Device Configuration view by scrolling through the properties for the module. By Manager on SeptemThis entry is filed under Simatic HMI and tagged clp siemens s7 200, cursos plc siemens, plc micro, plc siemens logo 230rc, plc siemens s7200, plc siemens step 7, s7 programm, s7 programming.
![clp siemens step 7 clp siemens step 7](https://instrumentationtools.com/wp-content/uploads/2015/11/Siemens-S7-300-CPU-Status-and-LED-Errors-Explanation.png)
The next step is to configure your port - set the baud rate, parity, stop bits, etc. simatic s7 plc 6AV6647-0AJ11-3AX0 SIMATIC HMI KP400 BASIC COLOR PN. Alternatively, there is a system constant tag created as well - you can find this under your Default Tag Table on the System Constants tab. You can view the port number by selecting the module in your device view - you're looking for the hardware identifier. Once you've added the module, a port identifier for the module will automatically be created. In Step 7, this is simple as opening up the device configuration device view and dragging the module to your PLC.
![clp siemens step 7 clp siemens step 7](https://engineerscommunity.com/uploads/db4532/original/2X/f/ff279d2e300dd3e5ec1a57eb864ca46517f89cf1.png)
The first step is to add the module itself to your device configuration. I happened to have a CM 1241 RS485 module on hand, so that's what I used. The serial slave I was working with was incredibly flexible and accepts both RS-485 and RS-232. Siemens (and Step 7) makes setting up basic point-to-point communication incredibly simple. For the current application, I was writing a simple function block to broadcast data to a Red Lion serial slave display, but there are a variety of situations in which you may need to do to this, such as communicating with a VFD. While there are many people in this office who do this regularly with other Siemens PLCs, it was the first time for any of us on an S7-1200, so I thought I'd share my experience.įirst of all, if this is your first experience doing this, you're in luck. Today, I found myself setting up some simple point-to-point serial communication on a Siemens S7-1200.