AXL E PB DI16 M12 6M
8431_en_03 15
PHOENIX CONTACT GmbH & Co. KG • 32823 Blomberg • Germany
phoenixcontact.com
14 Sync/freeze mode
The device supports sync and freeze mode.
The functions must be activated by the PROFIBUS master
in the parameter data.
Input and output data is written or read at defined times with
the sync and freeze commands.
If the device receives a sync command from the PROFIBUS
master at any given time, the current OUT process data is
transferred and frozen until the next sync command.
Similarly, the states of the inputs are transferred on the re-
spective freeze command and are frozen until the next
freeze command.
15 Diagnostic alarms
PROFIBUS enables the PROFIBUS device to store diag-
nostic information together with the error location and error
type.
In the default upon delivery the alarms are enabled, how-
ever, they can be disabled with parameters on startup.
An incoming alarm informs the PROFIBUS device that diag-
nostic information has been entered.
When the diagnostic information has been removed, an out-
going alarm is sent to the device.
If at least one piece of diagnostic information is stored, the
SF LED is on. If no diagnostic information is present, the
SF LED is off.
The following PROFIBUS diagnostic messages are indi-
cated by the PROFIBUS device:
– Overtemperature of the device
–Surge voltage of U
S
– Overload of U
S
