Diagnostics processing
58
8.8 Acyclic services
Technical manual LioN-Link BusHead EtherNet/IP™
Release 1.1 04/2016
data via acyclic objects.
8.8.1
Acyclic diagnostic object
In the case of an overflow of the diagnostic blocks or failure of one or more
I/O modules, diagnostic information can always be read from the BusHead
via the Class ID 0x64 / instance 1 / attribute 1.
In the Rockwell RSLogix 5000, this can be implemented with a MSG
Instruction. The illustration below shows the settings.
This means that all other modules with active diagnoses can be identified in
case of a diagnostic block overflow.
In case of I/O module communication failures, the defective modules can
also be determined, since the cyclic communication is stopped in this case.
A cyclic restart of both lines is then performed until the configurations stored
on the BusHead is again physically active.
The following diagnostic data can be read by the object:
Byte Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0
DIA
S1-M7
DIA
S1-M6
DIA
S1-M5
DIA
S1-M4
DIA
S1-M3
DIA
S1-M2
DIA
S1-M1
DIA
BusHead
1
DIA
S1-M15
DIA
S1-M14
DIA
S1-M13
DIA
S1-M12
DIA
S1-M11
DIA
S1-M10
DIA
S1-M9
DIA
S1-M8
2
DIA
S2-M7
DIA
S2-M6
DIA
S2-M5
DIA
S2-M4
DIA
S2-M3
DIA
S2-M2
DIA
S2-M1
not
used
3
DIA
S2-M15
DIA
S2-M14
DIA
S2-M13
DIA
S2-M12
DIA
S2-M11
DIA
S2-M10
DIA
S2-M9
DIA
S2-M8
