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Inst Tools > Blog > PLC Tutorials > Connect to the Siemens S7 PLC

Connect to the Siemens S7 PLC

Last updated: March 4, 2021 12:47 pm
Editorial Staff
PLC Tutorials
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To upload a program from a laptop or computer to Siemens S7 PLC, we need to connect the cable to establish communication using the available five types of methods.

Contents
Using PC Adapter CableUsing PCMCIA CardUsing Network Interface CardUsing Profi-NetUsing Industrial Laptop (Simatic Field PG)

Using PC Adapter Cable

Connect PLC using PC Adapter Cable

As shown in the above drawing, to transfer the program from PC to PLC, we have to connect one end of pc adapter to PLC’S MPI connector which is kind of serial communication by means of RS-485 and another end of PC adapter will go to the USB connection of PC/LAPTOP.

To use a PC adapter, we have to install a driver of PC adapter.

Using PCMCIA Card

Personal Computer Memory Card International Association is a slot which comes with laptop or PC, which is used to connect PLC

Using PCMCIA Card for Connecting PLC

For example,

  • if we use CP 55-11 card in the laptop, we can connect the laptop to DP OR MPI port to PLC.
  • If we use CP 15-12 card then we can connect to the ethernet port.

Using Network Interface Card

We can only use this with PC and not with a laptop because we have to insert this card in the computer’s motherboard.

There are different types of od cards we can use for the specific network we require.

For example, CP 56-11 card is used for Profibus connection, simply we have to insert this card in the computer’s motherboard, after inserting we can easily establish communication between PC and PLC.

Using Profi-Net

For those PLC’s which contain ethernet port, we can use a laptop or PC with the ethernet port.

We can easily establish a connection between them. If an ethernet port is not available in PLC we can use CP (communication processor) card.

Using Industrial Laptop (Simatic Field PG)

By this method, all the port and card which we have discussed above combine in a single laptop providing an easy interface to establish communication between PC and PLC.

Siemens Industrial Laptop (Simatic Field PG)

Author: Suhel Patel

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