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Diagnostics processing
Technical manual LioN-Link BusHead EtherNet/IP™
Release 1.1 04/2016
8.6 Diagnostic sequence in
Acknowledge Mode
55

Because the administrator has not yet acknowledged the diagnosis
(Acknowledge pending), the outgoing diagnostic information is stored on
the BusHead.

The administrator acknowledges the diagnosis by setting the
corresponding BusHead control bit to
1
.

The error code of the corresponding diagnosis is set to 0 because the
diagnosis no longer exists. The corresponding bit in the BusHead status
byte is set to
0
.

The administrator detects the change in the status byte (outgoing
diagnosis) and resets the corresponding bit in the BusHead control bite to
0
.

The BusHead detects resetting of the acknowledge bits in the control and
then deletes the entire diagnostic block. Diagnostic Code =
0
. The
diagnostic block is only available for the next diagnosis when all other
diagnoses have been acknowledged and are inactive.
Case 2: Acknowledgment of active diagnosis
 A diagnosis is entered in the first free diagnostics block, Diagnostic Code
!= 0. The "Active" bit in byte 2 of the diagnostic block and the
corresponding BusHead status are set to
1
.
 The administrator acknowledges the diagnosis by setting the
corresponding BusHead control bit to
1
.
 The diagnostic code of the corresponding diagnosis is not changed,
because the diagnosis is still present. The corresponding bit in the
BusHead status byte remains set to 1.
 The diagnosis no longer exists. The "Active" bit 7 in byte 2 of the
diagnostic block is set to
0
.
 The administrator detects the change in the status byte (outgoing
diagnosis) and resets the corresponding bit in the BusHead control bite to
0
.
 The BusHead detects resetting of the acknowledge bits in the control and
then deletes the entire diagnostic block. Diagnostic Code =
0
. The
diagnostic block is only available for the next diagnosis when all other
diagnoses have been acknowledged and are inactive.