R500
Series 8 I/O User's Guide
269
April 2017
Honeywell
13. Series 8 I/O Alarms and Failures
13.1 Reviewing IOM alarms generated by the C300
IOM alarms
The IOM block reports diagnostic alarms in the event of an IOM hardware failure or a
change in the IOM redundancy state. The IOM alarms that the C300 presents are listed in
the notification table below.
Table 66 IOM alarms displayed by the C300 controller
Notification type
Auxiliary descriptor text
Diagnostic alarm
Communication error
Configuration mismatch
No response
System info event
IOM power on
IOM switchover
HART alarms/events
The following are added to Series 8 HART IOMs.
Field device status notifications
Field device status notifications has one more extra byte called "extended device status
notifications". This byte is supported only by HART 6.0 devices.
Currently, only the following two bits of this byte are defined.
Extended device condition/bit
Type
Definition
Maintenance required / Bit 0
Alarm
Device requires maintenance.
Device variable alert / Bit 1
Alarm
Any device variable is in alarm or
warning state.
HALARMENABLE
A new parameter HALARMENABLE is added to HART configuration tab in the
channel block. This parameter is by default enabled and can be changed from Monitoring
side, irrespective of the channel point execution state of the IOM module state.