Hi Peter, thank you for your reply. There are about 50 devices PR21 installed in customer factory (not Bosch plant). These PR21 are connected to production line's power source properly as your diagram. However, everyday, the production line is powered On at 8:00AM and is powered Off at 6:00 PM. Hence, PR21 is powered Off without being shutdown properly by its own power switch. Some devices (PR21) works well next start, some device doesn't. The customer asked me to fix those PR21 which is not working on next start. I want to show to the customer that they are treating the device in improper way (power off the power source of the production line, without shuttingdown the PR21 properly). However, the customer says that there is no documents/user manual mentioning that.
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