Siemens enhanced driver with Tia portal V20 Firmware 4.0

Ignition
1

Hi,

Does someone got the Siemens driver working with a PLC on firmware V4 and Tia V20?
Before upgrading firmware from V3 to V4 and from Tia V18 to V20 was the communication working.

How i get in the log that a password i required

DEBUG

SymbolicAddressSpace

08Jan2026 10:07:36

Failed to load symbols

DEBUG

SymbolicAddressSpace

08Jan2026 10:07:36

Failed to load symbols. Error: 'AGL40_SYMBOLIC_PASSWORD_REQUIRED', '0xFFFA010C' SError: 'AGL40_SUCCESS','0x0'

DEBUG

SymbolFsm

08Jan2026 10:07:36

S(LOADING)               x E(LoadSymbolsFailure[cause=de.deltalogic.accon.aglink4.AglIOException: Method: 'symbolic_LoadAGLinkSymbolsFromPLC', Error Code: 'AGL40_SYMBOLIC_PASSWORD_REQUIRED', Error Nr: '0xFFFA010C', Error Message: 'AGL40_SYMBOLIC_PASSWORD_REQUIRED',]) = S'(LOADING_WAIT)        

DEBUG

SiemensS7Client

08Jan2026 10:07:36

This connection requires a password for symbolic access.

DEBUG

SiemensS7Client

08Jan2026 10:07:36

Error occurred while setting password for the PLC connection.

From what i see in Tia Portal configuration the password is the same as previously.
Here the setting in Ignition

image
image661×1162 37.4 KB

2

Which v4 firmware are you on? I know there were some earlier ones that were buggy for the upstream connections.

3

V4.0.0 and Ignition 8.3.2 (In docker)

4

Given the issues, I would suggest v4.0.4 and see if that helps. If anything, it might get you away from other bugs that have popped up in that firmware.

5

Well update to 4.0.4 didn’t help, i will need to check it on a fresh software if it works or not.