Siemens Modbus Tcp License Work

Before purchasing a license, it is critical to understand the role your Siemens PLC will play in the network architecture. Modbus TCP defines two roles:

Yes, the software controller (based on Windows) requires the same Modbus TCP license as the hardware PLC.

# Pseudo-code for a background service import snap7 from siemens_license_api import LicenseChecker siemens modbus tcp license

If you use a licensed block without a valid registration key: Functionality: Modbus communication will typically still work. Diagnostics:

The license is required on the engineering PC , not the PLC. You only need one license per engineer who programs the PLC. Once the code is downloaded to the PLC, the PLC runs the logic indefinitely, even if the engineer disconnects their PC. Before purchasing a license, it is critical to

Download your Modbus program to the CPU and put it in RUN mode. The Modbus block will generate an 18-character IDENT_CODE in its instance data block.

That depends on the CPU, not the license. An S7-1500 standard CPU supports up to 64 simultaneous Modbus TCP connections. The license does not limit connection count. Diagnostics: The license is required on the engineering

Purchasing a Siemens Modbus TCP license is a digital transaction.