116 Diagnostics WAGO-I/O-SYSTEM 750750-644 Bluetooth® RF-TransceiverManualVersion 2.0.0, valid from FW/HW Version 03/03Additional informationAn example configuration with WAGO-I/O-CHECK and the meaning of theindividual values in the status information are available in the section “ExampleConfiguration” > … > “Diagnostics”.10.2 Diagnostics via Process Image or LED DisplayThe most important diagnostic information and statuses available via processimage or LED display are explained below.• No field supply• No radio connection• Signal quality of the radio connections• Validity of the process data• Topicality of the process data• Configuration errors10.2.1 No Field SupplyIf there is no field supply, LED A lights up red and all other LEDs are off. Thestatus byte (byte 0) in the process image of the inputs then have the value 0x40.The 750-644 I/O module processes register communication or parameter channeldata, but does not respond to the Mailbox protocol.The status byte in the process image of the inputs can also take the value 0x40under other conditions. However, you can easily avoid misinterpretation:• Initialization after restart not yet completed:Wait several seconds (see section “Function Description” > … > “StartupBehavior”). If the LED indicators or the value of the status byte does notchange during this time:Check if one of the following cases applies.• “Configuration” mode when the Mailbox is hidden or “Real-TimeCommunication” mode when the Mailbox is hidden and at least oneinterrupted radio connection:Show the Mailbox (see section “Process Image” > … > “Control/StatusByte” and “Mailbox”). If the I/O module confirms displaying the Mailbox,there is sufficient field supply available.Fehlt die Feldversorgung, leuchtet LED A rot, alle übrigen LEDs sind aus. DasStatusbyte (Byte 0) im Prozessabbild der Eingänge weist dann den Wert 0x40 auf.Die Busklemme 750-644 verarbeitet zwar Daten der Registerkommunikation oderdes Parameterkanals, reagiert jedoch nicht auf das Mailbox-Protokoll.
