Interrupts/diagnostics alarms
5.3 Alarms
Communication module CM 8x IO-Link + DI 4x24VDC M12-L (6ES7148-6JG00-0BB0
32 Equipment Manual, 09/2020, A5E49284833-AA
5.3 Alarms
The IO-Link master can generate diagnostic alarms of the type (severity) "Diagnostics" or
"Maintenance" on behalf of the IO-Link device or the IO-Link port.
• Alarms of the "Diagnostics" type indicate a malfunction of the IO-Link device / port and
should be corrected immediately.
• Alarms of the "Maintenance" type indicate a maintenance demand. The aim is to detect
and eliminate potential faults at an early stage, even before functionality is impaired.
• Process alarm events signal the corresponding process states on the IO-Link device (e.g.
limit exceeded)
5.3.1 Diagnostics alarms
IO-Link master error types
All IO-Link events of the type Error generated by the IO-Link device or port are mapped to the
PROFINET diagnostics alarm of the type (severity) "Diagnosis" of the assigned submodule.
IO-Link device diagnostics
The IO-Link master generates PROFINET channel diagnostics (CET, ECET) from the IO-Link
events of an IO-Link device according to the following mapping regulations:
In the "IO-Link Device Diagnostics - Page 1" (CET 0x9500
H) the IO-Link event codes in the
range 0x0000 - 0x7FFF
H are displayed directly:
ECET
H = IO-Link Event CodeH
In the "IO-Link Device Diagnostics - Page 2" (CET 0x9501
H) the IO-Link event codes in the
range 0x8000 - 0xFFFF
H are displayed directly:
ECET
H = (IO-Link Event CodeH – 0x8000H)
Table 5- 5 Overview of error types IO-Link device diagnostics
IO-Link event
Error type
Extended error
Error text Meaning
H
H
See the manual of the IO-Link de-
vice or IODD file used.
H
H
See the manual of the IO-Link de-
vice or IODD file used.
Example of displaying the IO-Link event codes:
An IO-Link device generates event code 0x4000
H (type "Error").
The channel diagnostics from the event code:
• PROFINET channel diagnostics type: Diagnosis, CET: 0x9500
H, ECET: 0x4000H
Diagnostics alarm "IO-Link Device Diagnostics - Page 1, Temperature fault - Overload",
generated from the IO-Link event code 0x4000
H.
IO-Link port diagnostics