138
A-5
Alarms
PROFINET IO is capable of sending events within the automation process as
alarms. These alarms have to be acknowledged by the application process.
These include both system-defined events (i.e. Removal of slices) or user-
defined events (i.e. Input voltage out of range).
The following events are distinguished:
/i
PROFINET defines a standard set of alarm causes, like
/i
Alarms are always identified by the indication of the slot/subslot.
Type
Description
Process alarms
Events from the process, which are sent to the control system.
Diagnostics alarms
Events indicating a malfunction of a field device.
Maintenance alarms
Events relating to preventive maintenance to avoid device
breakdown.
Manufacturer-specific
diagnostics
Events relating to events specific for the manufacturer.
Type
Description
Pull and plug alarms
Events related to modular IO Devices, such as the GRT1-
PNT. A slice module is removed or plugged in.
Plug wrong submodule Events indicating an incorrect submodule has been
configured or inserted.
Note
Alarm handling Process
Since the IO Device is only capable to hold detailed alarm information for 2 alarms (1
high and 1 low alarm) the alarm must be acknowledged by the IO Controller. When an
IO Device generates an alarm this is reported via bit 4, IO Devices Alarm received, in
the IO Device status (see section 5-2-5 IO Device status (Word n+7)).
The IO Device New Alarm flags area (see section 5-2-7 IO Device New Alarm flags
(Word n+17 ~ Word n+25)) can be used to determine the IO Device(s) reporting the
alarm(s). To read the alarm data use the FINS memory area read command (see sec-
tion 6-2-1 MEMORY AREA READ (0101)). As a result the alarm flag(s) will be cleared
and IO Devices can report new alarms.
Содержание CJ1W-CRM21
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