Bug: Reading PLC variables via the ReadPlcVariables parameter is broken with the S7-1500 PLC firmware V3.0 - References - SIMATIC AX - AX Hardware Engineering documentation

Bug: Reading PLC variables via the ReadPlcVariables parameter is broken with the S7-1500 PLC firmware V3.0 - References - SIMATIC AX - AX Hardware Engineering documentation - Hardware Engineering,

Hardware Engineering reference

Portfolio

SIMATIC AX

Product

SIMATIC AX

Software version

3.0.0

Edition

08/2025

Language

English (original)

Package Name

@ax/hw-docs

Due to a known bug in V3.0 of the S7-1500 PLC firmware, PLC variables cannot be read via a web server if only the ReadPlcVariables function right is assigned to a user. This bug is fixed in the V3.0.3 firmware update of S7-1500 PLCs. For these limited number of firmware versions affected by the bug, a user must also have the ReadFiles function right to be able to read PLC variables.