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AS-i CC-Link Gateway
Advanced Diagnostics for AS-i Masters
11.3
Clear the diagnostic buffer
The diagnostic buffer in the device can only be deleted when there is no field bus
connection to the higher-level controller. If in an existing bus connection yet the
'clear diagnostic buffer' is pressed, the diagnosis can only be deleted in the web
interface and not on the device.
11.4
Offline Phase for Configuration Errors
The AS-i masters with advanced diagnostics offer the possibility to set them-
selves into the offline phase when a configuration error occurs and thus are able
to transition the AS-i network into a safe operational state. This ensures a quick
reaction to a configuration error and the host can be relieved from this task. If any
problems occur on the AS-i network, the AS-i masters can independently switch
the AS-interface into a safe state.
There are two different ways to parameterize the AS-i master for this feature:
•
Any configuration error occurring on AS-i switches the master from regular
operation in protected mode into the offline phase.
•
o . A list with the addresses of slaves that can potential initiate the off-line
phase is defined (list of offline slaves LOS).
The user can decide how the system should react to a configuration error on
AS-i. Thus, the AS-i master can be set to the offline phase for critical AS-i slaves,
whereas for less critical slaves only the error message is sent to the host, but AS-
i is still running.
Like the advanced diagnostics, the parameterization "offline phase on configura-
tion error" is also supported by "AS-i-Control-Tools"
(Command | Characteristics | Offline because of configuration error).
There are two options to reset the error message "OFFLINE BY LOS:
1.
Deleting the complete LOS list on the affected AS-i network ("CLEAR ALL").
2.
Power reset on the affected AS-i network.
11.5
Functions of the AS-i Fault Detector
11.5.1
Earth/Ground Fault Detector
An Earth/Ground Fault exists when the voltage
U
=0,5 U
GND
10% U
This error substantially limits the noise immunity of the AS-i communication.
Ground faults are indicated on the master´s display as well as in AS-i Control
Tools.
Information!
To recognize ground faults the master must be grounded with its machine ground con-
nection.
52
.) is outside of the following range:
AS-i
U
90%U
AS-i
GND
AS-i
U
(Nominal value of
GND
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