Which products are affected?
ESP-HMI1-P (HMI Designer version 1.3 up to 1.6)
EPM-H502 (Touch screen)
EPM-H505 (Touch screen)
EPM-H510 (Touch screen)
EPM-H520 (Touch screen)
What happens?
Dependent on the value of a variable, the threshold variable, a TouchKey can be inactivated or hidden.
When opening an operating page, the TouchKeys, which should be hidden or inactivated due to the value of the corresponding threshold variable, are visible and active for a short period of time. If the operator activates the TouchKey now, the function of the TouchKey will be executed.
When does the problem occur?
Generally, when opening an operating page all TouchKeys of this page are visible and active. The threshold variable of the respective touch keys will be checked and dependent on the value of the threshold variable, the TouchKey will be hidden or inactivated.
Possible diagnostics?
None.
Short-term measures/recommendations?
Do not use a threshold variable to inactivate or hide TouchKeys of touch screen keypads.
Evaluation:
After opening an operating page the operator can activate an inactivated/hidden TouchKey, so that its function is executed. This 'faulty' operation can cause interferences in the flow of the machine.
