Description: there is a connection from my App to PLC through PLCHandler (v3.5.8.0)
Then i make call SyncReadVarsFromPlc(char ppszSymbols,...) several (or many) times which allocates variable list(s).
And each time I accidentally forget to call SyncReadVarsFromPlcReleaseValues()**
I understand that I am totally wrong, but when I close the connection to PLC the following can be seen:
1) in case of OEM HARDWARE PLC (ARM,CoDeSyS Runtime 3.5.SP6, QNX 6.5.0) - CPU Usage is up to 100%, established network connections to PLC are still working, new network connections are failed; such runtime behavior lasts in proportion to the number of SyncReadVarsFromPlc calls; then (after runtime release and clean resources?) PLC returns to normal working state.
2) in case of CODESYS Control Win V3 SoftPLC(Windows 7x64, CoDeSyS 3.5.SP6) - CPU Usage of ServiceControl.exe (Service for starting/stopping the services of CODESYS Control Win V3 and CODESYS Gateway Service V3) is up to 30%, established network connections to SoftPLC are still working, new network connections are failed; normal working state of ServiceControl.exe may be restored only after service restart.
Solution is clear - to call SyncReadVarsFromPlcReleaseValues.
But why does runtime make so high CPU Usage during resource cleanup of the closed PLCHandler connection?
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Hello!
Description: there is a connection from my App to PLC through PLCHandler (v3.5.8.0)
Then i make call SyncReadVarsFromPlc(char ppszSymbols,...) several (or many) times which allocates variable list(s).
And each time I accidentally forget to call SyncReadVarsFromPlcReleaseValues()**
I understand that I am totally wrong, but when I close the connection to PLC the following can be seen:
1) in case of OEM HARDWARE PLC (ARM,CoDeSyS Runtime 3.5.SP6, QNX 6.5.0) - CPU Usage is up to 100%, established network connections to PLC are still working, new network connections are failed; such runtime behavior lasts in proportion to the number of SyncReadVarsFromPlc calls; then (after runtime release and clean resources?) PLC returns to normal working state.
2) in case of CODESYS Control Win V3 SoftPLC(Windows 7x64, CoDeSyS 3.5.SP6) - CPU Usage of ServiceControl.exe (Service for starting/stopping the services of CODESYS Control Win V3 and CODESYS Gateway Service V3) is up to 30%, established network connections to SoftPLC are still working, new network connections are failed; normal working state of ServiceControl.exe may be restored only after service restart.
Solution is clear - to call SyncReadVarsFromPlcReleaseValues.
But why does runtime make so high CPU Usage during resource cleanup of the closed PLCHandler connection?
Si
Inviato dal mio Y100_Plus utilizzando Tapatalk