ADwin S7 PLC interface

Ethernet communication

The Simatic Fetch/Write communication via Ethernet network is a point-to-point connection between an ADwin system and a Simatic PLC. The connection enables write and read-only access to the system memory of the Simatic PLC. Access is available to data modules, flags, inputs, outputs, counters and timers.

The ADwin system is the client which runs the active communication. Seen from Simatic S7 the communication function is passive and only needs configuration. The PLC cannot access the ADwin system.

Requirements for access to a Simatic PLC:

  • ADwin system with Ethernet interface ENET2, current firmware and Bootloader option
  • Simatic PLC with Communication Processor (CP), which supports the Fetch/Write protocol
  • Two configured network connections on the PLC, one for Fetch and one for Write.

ADwin functions

In an ADbasic process a global parameter controls the communication with the PLC. The sent and received data, as well as the configuration data for communication, are stored in global arrays.

Parameters to be configured:

  • Array numbers for sent and received data
  • Number and start address of data to be transferred
  • Network configuration of the PLC: IP and port numbers
  • Type of system module (DB, flag, etc.)
  • TCP/IP timeout and polling time.

Download the ADwin Communication to Simatic PLC datasheet for more information.

Supported Simatic CPs

Generally, all CPs may be used which support the Fetch/Write protocol via TCP.

Simatic S7-300:

  • CP 343-1 Lean
  • CP 343-1 IT
  • CP 343-1
  • CP 343-1 Advanced
  • CP 343-1 PN.

Simatic S7-400:

  • CP 443-1
  • CP 443-1 Advanced
  • CP 443-1 IT.

The Next Steps

Featured Downloads

What do our Customers say about us?

Took me from a complete beginner to a user in very easy steps.

Thank you very much for all of the help that you and your colleagues have provided! I really appreciate the quick response to my email. I was worried my email wouldn’t be addressed, but I see that your company really cares about going above and beyond the expectations of the user.

JD, Denver, USA

Thank you – again! Even those of us who do not like being the damsel in distress sometimes have need of knights in shining armour.

SA, Bradford, UK

Yet again Origin and OriginPro upholds its foremost status as the best purposeful and all-embracing data analysis and graphing software on the market. Although other software packages exist, few are as straightforward to use, flexible, and high-quality when it comes to performing challenging data analysis or creating publication superior graphs.

Keith J. Stevenson, Professor of Chemistry, The University of Texas at Austin

For the time being we are unable to offer the following product ranges although we are currently working hard to increase the number of products we can offer in the future. Please contact us to talk about alternative products that we may be able to offer you.