Weidmuller Power Monitor Handbuch Seite 225

Communications
Conditions for no response
The Slave does not respond under the following conditions:
◊ Parity error
◊ CS error
◊ Data length (L) does not match byte count
◊ Error on write or read of transmission address
◊ The programming key (<MODE> key) has not been pressed
Programming key
◊ Programming key is the <MODE> key.
◊ With every display, the settings can only be changed by pressing the <MODE> key.
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