Connecting a computer to a Siemens S7-200 CPU is a straightforward process. Here are the steps to achieve this:
Power up the S7-200 CPU: Ensure that the PLC (S7-200 CPU) is powered up and operational. Make sure the power supply is properly connected and functional.
Connect the RS-232/PPI Cable or 6ES7901-3CB30-0XA0: Use an RS-232/PPI communication cable to connect the PLC and the computer. One end of the cable should be connected to the RS-232/PPI port on the S7-200 CPU, and the other end should be connected to the serial port on the computer. Note that some computers might not have a native serial port, in which case you may need a USB-PPI or 6ES7 901-3DB30-0XA0.
Open Programming Software (STEP7-Micro/WIN): Launch the programming software, which is STEP7-Micro/WIN for the Siemens S7-200 series. Ensure that you have installed the necessary drivers and software components for communication with the PLC.
Configure Communication Parameters: In the STEP7-Micro/WIN software, set the communication parameters to match the settings of the S7-200 CPU. These parameters typically include the communication protocol (RS-232/PPI), the communication port (COM port number), the baud rate, data bits, stop bits, and parity. The specific parameters should match those set in the PLC.
Establish Connection with S7-200: Once the communication parameters are correctly configured, use the software to establish a connection with the S7-200 CPU. The software should attempt to connect to the PLC using the specified communication settings. If the connection is successful, you should be able to communicate with the PLC and read/write data to and from the CPU.
It’s important to ensure that you have the appropriate hardware (RS-232/PPI cable) and software (STEP7-Micro/WIN) for communicating with the Siemens S7-200 PLC. Additionally, verify that the PLC is powered up and that the communication parameters in the software match the settings in the PLC to establish a successful connection.