Non-formal invocation of function blocks in CODESYS ^{CODESYS Forge talk (Thread)}
Non-formal invocation of function blocks in CODESYS
Last updated: 2025-12-05

CODESYS OPC UA Security: HMI Client Not Receiving Server Certificate ^{CODESYS Forge talk (Thread)}
CODESYS OPC UA Security: HMI Client Not Receiving Server Certificate
Last updated: 2026-01-06

CODESYS OPC UA Security: HMI Client Not Receiving Server Certificate ^{CODESYS Forge talk (Thread)}
CODESYS OPC UA Security: HMI Client Not Receiving Server Certificate
Last updated: 2026-01-06

Codesys 3.5.21.3 add Library search not work ^{CODESYS Forge talk (Thread)}
Codesys 3.5.21.3 add Library search not work
Last updated: 2026-01-20

RS232 Communication in CODESYS Control RTE V3 ^{CODESYS Forge talk (Thread)}
RS232 Communication in CODESYS Control RTE V3
Last updated: 2026-01-28

Codesys EtherCAT Driver (CmpEt1000MPD) can't set MAC address ^{CODESYS Forge talk (Thread)}
Codesys EtherCAT Driver (CmpEt1000MPD) can't set MAC address
Last updated: 6 days ago

Post by artplc on 3.5 P20 hangs - no response ^{CODESYS Forge talk (Post)}
Subject: Solution: CODESYS Freezes Linked to Large Symbol Configuration (OPC UA) Hello everyone, I was experiencing the same problem as many here: CODESYS (v3.5 SP20+) freezing during compilation and download, especially on projects that use OPC UA for SCADA. The only workaround was to run Build > Clean all before every download. I believe I have found the root cause and a permanent solution. The Problem: The issue is directly related to a large Symbol Configuration. In my project, I only need about 700 tags for OPC UA, but the Symbol Configuration list was showing over 250,000 tags. This is because it automatically includes all variables from Global Variable Lists (GVLs) and other memory areas. When any static variable is changed, the IDE tries to rebuild this enormous list, causing it to freeze for several minutes. The Solution: Instead of letting CODESYS export every variable by default, you can use a pragma to tell it which variables or GVLs to exclude from the symbol export process. Place the following pragma at the top of any GVL or data structure that you do not want to be part of the symbol configuration: 1 {attribute 'symbol' := 'none'} 2 VAR_GLOBAL 3 // All variables in this GVL will now be excluded from the 4 // Symbol Configuration by default. 5 InternalVariable1 : INT; 6 InternalVariable2 : BOOL; 7 END_VAR After adding this pragma to all the GVLs that were not needed for OPC UA, the number of tags in my Symbol Configuration dropped to the correct amount. The compilation and download process is now fast again, with no freezing. This method is much more efficient than manually managing the symbol list in the editor. I hope this helps others who are facing this frustrating issue. Best regards.
Last updated: 2025-08-10

communication ^{CODESYS Forge talk (Thread)}
communication
Last updated: 2023-08-19

NETVAR_UDP ^{CODESYS Forge talk (Thread)}
NETVAR_UDP
Last updated: 2023-08-29

VPN ^{CODESYS Forge talk (Thread)}
VPN
Last updated: 2023-09-06

VPN ^{CODESYS Forge talk (Thread)}
VPN
Last updated: 2023-09-06

VPN ^{CODESYS Forge talk (Thread)}
VPN
Last updated: 2023-09-06

ernesto881124 ^{CODESYS Forge talk (Thread)}
ernesto881124
Last updated: 2023-09-14

Benutzeranmeldung ^{CODESYS Forge talk (Thread)}
Benutzeranmeldung
Last updated: 2009-01-19

Trend ^{CODESYS Forge talk (Thread)}
Trend
Last updated: 2021-11-26

Warten ^{CODESYS Forge talk (Thread)}
Warten
Last updated: 2009-09-17

(no subject) ^{CODESYS Forge talk (Thread)}
Last updated: 2007-09-28

IJSONData.FindAllElementsByKey ^{CODESYS Forge talk (Thread)}
IJSONData.FindAllElementsByKey
Last updated: 2021-12-09

SysDir ^{CODESYS Forge talk (Thread)}
SysDir
Last updated: 2022-02-15

MaxNodesPerRead ^{CODESYS Forge talk (Thread)}
MaxNodesPerRead
Last updated: 2018-03-16

Time ^{CODESYS Forge talk (Thread)}
Time
Last updated: 2023-03-03

Sprachumschaltung ^{CODESYS Forge talk (Thread)}
Sprachumschaltung
Last updated: 2009-06-10

Reglersimulation ^{CODESYS Forge talk (Thread)}
Reglersimulation
Last updated: 2018-01-16

swiping ^{CODESYS Forge talk (Thread)}
swiping
Last updated: 2020-11-30

CODESYSControl.cfg ^{CODESYS Forge talk (Thread)}
CODESYSControl.cfg
Last updated: 2015-06-02

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