3 Displays and diagnosis
BU 0280 GB Subject to technical amendments 31
3.1.2.2 DeviceNet displays
The status of the DeviceNet module is indicated by the LEDs MS and NS.
LED (dual)
MS
Module Status
Significance
... ... Slow flashing = 2Hz (0.5s cycle)
OFF No voltage supply
ON (green)
Normal operation, cyclic exchange of data via DeviceNet
Flashing 0.5s
(green)
Module in standby mode, no connection to one or more FIs. (No
parameters have yet been exchanged. Therefore setpoint specification
via the DeviceNet AC profile is not possible)
The baud rate setting for the DeviceNet bus is invalid.
ON (red):
Error which cannot be acknowledged. The module may need to be
replaced.
Flashing 0.5s
(red)
The module has an error which can be acknowledged
LED (dual)
NS
Network Status
Significance
... ... Slow flashing = 2Hz (0.5s cycle)
OFF No voltage supply
The module has not carried out the “Dup_MAC_ID“ test
ON (green)
Normal operation, cyclic exchange of data via DeviceNet
Flashing 0.5s
(green)
The module is online and has carried out the “Dup_MAC_ID” test, but
has not set up communication to the other subscribers
ON (red):
Serious communication error, such as Bus Off, Duplicate MAC ID or
invalid baud rate setting
Flashing 0.5s
(red)
Timeout – The I/O connection or the P151 function has triggered a
timeout error.
The flashing code is displayed for at least 5 seconds.
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