Hello,
>
>at first some questions
>1. When was installed System. How Long function was going well.
>2. You got 2 systems, they are installed in same factory or second System on a other place
>3. Master has no freqency contact ( red lamp on ), what are slaves doing ( red lamp on or flashing )
>
>In factory they must check up our frequency we use, is there using anf other Radio System there or frequency near our frequency.
>By your description I see it’s no frqency Transmission.
>
>Best regards
>Harald Mueller