how to determine the cycle time of a POU? ^{CODESYS Forge talk (Thread)}
how to determine the cycle time of a POU?
Last updated: 2010-03-01

Turck HMI needs to reload program on every power cycle ^{CODESYS Forge talk (Thread)}
Turck HMI needs to reload program on every power cycle
Last updated: 2022-09-22

Main Task cycle too long leading to PLC Fail ^{CODESYS Forge talk (Thread)}
Main Task cycle too long leading to PLC Fail
Last updated: 2024-03-08

High Cycle Times for SoftMotion_PlanningTask when using AxisGroup ^{CODESYS Forge talk (Thread)}
High Cycle Times for SoftMotion_PlanningTask when using AxisGroup
Last updated: 2024-03-22

EtherCAT drive going into fault mode require power cycle everytime ^{CODESYS Forge talk (Thread)}
EtherCAT drive going into fault mode require power cycle everytime
Last updated: 2024-09-11

Is there Python script to select/set the "Bus cycle task" ? ^{CODESYS Forge talk (Thread)}
Is there Python script to select/set the "Bus cycle task" ?
Last updated: 2018-04-20

Changing the Cycle Interval of a Task at Runtime (PLC Running) ^{CODESYS Forge talk (Thread)}
Changing the Cycle Interval of a Task at Runtime (PLC Running)
Last updated: 2018-07-17

How to access the value of a variable held in the previous cycle in ST? ^{CODESYS Forge talk (Thread)}
How to access the value of a variable held in the previous cycle in ST?
Last updated: 2021-09-01

Signal Jittering on the Output of Raspberry PI for Scan Cycle less than 1ms ^{CODESYS Forge talk (Thread)}
Signal Jittering on the Output of Raspberry PI for Scan Cycle less than 1ms
Last updated: 2019-06-15

Exceeded the EtherCAT task cycle time when the controller is rebooted ^{CODESYS Forge talk (Thread)}
Exceeded the EtherCAT task cycle time when the controller is rebooted
Last updated: 2023-01-12

How can I put a delay in a st code with a for cycle? ^{CODESYS Forge talk (Thread)}
How can I put a delay in a st code with a for cycle?
Last updated: 2019-11-12

Post by manuknecht on High Cycle Times for SoftMotion_PlanningTask when using AxisGroup ^{CODESYS Forge talk (Post)}
Hi These issues occured using a Raspberry Pi 4. I also repeated the experiment with codesys control for Windows, which results in much lower cycle times. With up to 3 ms, I still think they are fairly high given they should run at 2 ms and don't require complicated kinematics. The effect of higher cycle times for slower movements also prevails.
Last updated: 2024-03-13

Post by nathant on Saving variable values on power cycle (RevPi Connect) ^{CODESYS Forge talk (Post)}
Hello, this seems to be a known issue, but persistent/retain variables don't seem to work properly on RevPi devices. Is there a workaround to this? All I need is for a few configuration variables to be remembered through power cycle.
Last updated: 2023-12-03

Post by trycyclepower on EtherCAT drive going into fault mode require power cycle everytime ^{CODESYS Forge talk (Post)}
I have EtherCAT servo drive lost communication with PLC everytime it gets faulted, it does not not communicate until I power cycle everything again, how to solve this issue?
Last updated: 2024-09-11

RPI can system operation like rm in a shell have an impact on a Task cycle time ^{CODESYS Forge talk (Thread)}
RPI can system operation like rm in a shell have an impact on a Task cycle time
Last updated: 2024-09-27

Post by banialuk on CAN Open Manager - varible of SYNC ^{CODESYS Forge talk (Post)}
Hello, were I have find varaible of SYNC "Cycle Period" , or variable that informs about the start of a new cycle SYNC. I want to use this variable in program code. I need to for communication beetween Mster and slave, and send PDO informations.
Last updated: 2024-10-26

Post by banialuk on CAN Open Manager - varible of SYNC ^{CODESYS Forge talk (Post)}
Hello, were I have find varaible of SYNC "Cycle Period" , or variable that informs about the start of a new cycle SYNC. I want to use this variable in program code. I need to for communication beetween Mster and slave, and send PDO informations.
Last updated: 2024-10-26

Post by snhatton on Saving variable values on power cycle (RevPi Connect) ^{CODESYS Forge talk (Post)}
Have you tried using the persistence manager which uses the file system of the controller to store persistent variables?
Last updated: 2023-12-04

Post by ton on How to create a stopwatch? ^{CODESYS Forge talk (Post)}
If you use LTIME() you will be very accurate and be able to have a normal task cycle time.
Last updated: 2023-12-16

Post by tk096 on High Cycle Times for SoftMotion_PlanningTask when using AxisGroup ^{CODESYS Forge talk (Post)}
Hi, which (kind of) PLC do you use?
Last updated: 2024-03-13

Post by tk096 on SMC_NCDecoder very slow to decode lines ^{CODESYS Forge talk (Post)}
Hi, you can call the decoder function block in a loop and/or decrease the task cycle interval of Task_PATH.
Last updated: 2024-08-23

Post by eschwellinger on RPI can system operation like rm in a shell have an impact on a Task cycle time ^{CODESYS Forge talk (Post)}
Which version exactly do you use?
Last updated: 2024-09-23

Post by manuknecht on High Cycle Times for SoftMotion_PlanningTask when using AxisGroup ^{CODESYS Forge talk (Post)}
Hi, we did install the real-time kernel patch on the RPI and also performed the additional optimizations including isolating the cores. Changing the configuration of the planning task e.g. running it on a separate core, changing the cycle times and mode from cyclic to freewheeling did not show any improvements.
Last updated: 2024-03-14

Post by acc00 on Main Task cycle too long leading to PLC Fail ^{CODESYS Forge talk (Post)}
I have 2 Wago PFC200 PLC, running with Runtime SP19 Patch 5, with the Redundant application. The PLC communicates as Modbus Master with at this moment 15 Modbus Slaves -later there will be 28 in total- (Drives, Power management units,...). These devices are connected in 2 rings (1 ring of Drives, 1 ring of Power Management units), with 2 Managed Moxa Switches being part of the ring. Each PLC is connected to one of these switches. The issue I'm encountering is that the Cycle time of the Active PLC goes very high when I'm closing the Drive ring (simulating an issue on one Cabinet supply, resulting in that one Drive shut down, which can happen on field quite often). As a result of this long cycle, the PLC fails and goes to Exception, and the Passive PLC does not take control of the system. A normal cycle is around 30ms for the Main task, and a few ms for the Ethercat task. When I monitor with Profiler, I see that in this Maximum Cycle, the main Task is only taking 13ms, so I'm not sure where the PLC is hanging for so long. Is the remaining cycle time the Redundant management/sync or something else? Thank you in advance.
Last updated: 2024-03-08

Post by manuknecht on High Cycle Times for SoftMotion_PlanningTask when using AxisGroup ^{CODESYS Forge talk (Post)}
Hello all I am using an AxisGroup with the Gantry2 Kinematics to move a 2D-Gantry system. When creating the AxisGroup, the SoftMotion_PlanningTask is created automatically with a cycle time of 2 ms in my case. I realized that the maximum cycle time of this task can spike to very high values (up to 60 ms) at lower speeds of the motion, leading to synchronization issues and errors on the axes. The same behaviour - though not as drastic - can be observed with virtual axes too. Is this behaviour intended or to be expected? Can the cycle time or type of the SoftMotion_PlanningTask be changed to prevent these errors? Or is there another fix for this issue? I tried changing the cycle type to Freewheeling, which solved the synchronization issues, but caused an error on the AxisGroup after a while, reading SMC_CP_QUEUE_UNDERRUN. Thanks in advance and best regards Manuel
Last updated: 2024-03-07

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