Bug: Reading plc variables via 'ReadPlcVariables' parameter is broken with V3.0 firmware of S7-1500 PLCs - References - SIMATIC AX - AX Hardware Engineering documentation

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

Hardware Engineering reference

Portfolio

SIMATIC AX

Product

SIMATIC AX

Software version

2.0.0-alpha1.56

Edition

08/2025

Language

English (original)

Package Name

@ax/hw-docs

Due to a known bug in v3.0 firmware of S7-1500 PLCs, PLC variables cannot be read via web server if only 'ReadPlcVariables' function right is assigned to a user. This bug is fixed in V3.0.3 firmware update of S7-1500 PLCs. For these limited set of firmware versions that are influenced by the bug, a user must also have 'ReadFiles' function right to be able to read PLC variables.