KTP700 Basic HMI and S7-200 PLC Communication

How to communicate Simatic KTP700 Basic DP HMI and S7-200 PLC use RS485 Interface? This post guides you to do it.

Table of Contents

Communication KTP700 Basic HMI and S7-200 PLC. What do you need?

To connect KTP700 Basic HMI and S7-200 PLC you need some things:

The Software:
- - For HMI device: WinCC V13 or higher. In this post, we use WinCC Advanced Version 15.1 (TIA Portal V15.1) on Windows 10 Pro 64-bits (Version 1903) operating system.
  - For PLC device: Step7 Micro/WIN V4.0 SP9 on Windows 10 Pro 64-bits Version 1903.
The Hardware:
- - Simatic HMI KTP 700 Basic DP.
  - Siemens PLC S7-200 CPU 224
  - RS485 cable (RS232/RS485 Serial Port DB 9pin: 02pcs, cable). You can refer to the post to make a communication HMI and PLC.

Could be helpful for you:

To config on Step7 MicroWIN V4.0 SP9 please follow the steps:

Step 1: Click “System block” -> “Communication Ports”.
Step 2: Set the parameter: PLC Address: 2; Highest Address: 2; Baud rate: 187.5 kbps … See all on the picture below.
Step 3: Compile the project and download it to the PLC device.

Step 1: Create a project and select KTP700 Basic DP. I used HMI Code: 6AV2 123-2GA03-0AX0.
Step 2: On “Project tree”, click “HMI [KTP700 Basis DP] -> “Connection”.
Step 3: Create an HMI connection to S7-200 PLC. The communication driver is “SIMATIC S7 200”.
Step 4: Set the parameters:
- - HMI device: Type: Simatic; Baud rate: 187500; Address: 1; Access point: S7ONLINE.
  - PLC: Address: 2
Step 5: Compile the project and download it to the HMI device. With KTP700 Basic you can download the project to the device by using a PROFIBUS/MPI cable or USB Disk. On our blog we guided both methods, you can refer to it.

Previous posts:

Check the HMI device serial interface, 9-pin sub-D socket, female as below

Final, we use the connection diagram to make the cable with:

Enjoy the result. Now, you can connect, control the S7 200 PLC with KTP700 Basic DP. And, if you have any questions, please comment below.

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