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7.18.5 DSB block diagnostic alarms
When active, the DSB block reports the following diagnostic alarms.
Communication break with PROFIBUS slave
PROFIBUS slave configuration failure
Connection break with PROFIBUS slave
Lost Connection to Slave
Module fault on Slot n
Then it indicates...
The DSB is created but not loaded.
All configuration parameters are loaded.
The DSB or at least one PDC has configuration error or slave
device indicates configuration error in diagnostics data and
slave device is communicating. PDC configuration error can be
non bound net tag, input bound to output data or vice versa or
size of net tag bound to PDC is not big enough to store data for
all channels defined in PDC.
The device diagnostics data indicates that slave device is
communicating and there are no configuration errors.
The device diagnostics data indicates that slave device is not
The DSB block has detected critical internal software error that
prevents communication with device. If the DSB block enters
this state, the state does not change until the DSB is reloaded.
This is a high-priority alarm that is reported when the slave device is
not able to communicate with the master over the network. This alarm
is reported only when the PROFIBUS network is functional.
This alarm is not generated when the master has only one slave
device connected. This is because, the master cannot identify if
the network is down of if the slave device is in a fault state.
To rectify this error, you must check the slave device address and the
This is a high-priority alarm that is reported when the slave device
configuration in the field network configuration does not match with
the slave device hardware configuration.
To rectify this error, you must check the slave device configuration in
the field network.
This alarm is reported when a DSB is physically disconnected from the
PBLink or an I/O module is physically disconnected from the DSB.
This alarm is reported when a device is disconnected from the
This alarm returns to normal when the slave device is connected back
in the network.
This alarm is reported when the diagnostic data indicates failure in the
module in slot "n." When this alarm is reported, the Trip Value field in
the alarm summary displays the module status reported in the extended
This alarm returns to normal after fresh diagnostics are received for the
slot and the diagnostics does not indicate a module failure. For each
faulty slot, an alarm is reported.
7 DEVICE SUPPORT BLOCK (DSB)