Emerson Micro Motion 3711 Configuration And Use Manual page 91

Configuring I/O
Figure 7-15 Pulse Inputs – Alarms panel
Table 7-14 Pulse Inputs – Alarms parameters
Parameter Description
Low Alarm Specify the value, in EUs, to which the input value must fall to
generate a low alarm.
High Alarm Specify the value, in EUs, to which the input value must rise to
generate a high alarm.
LoLo Alarm Specify the value, in EUs, to which the input value must fall to
generate a low-low alarm.
HiHi Alarm Specify the value, in EUs, to which the input value must rise to
generate a high-high alarm.
Rate Alarm Specify the value, in EUs, that defines the maximum amount of
change allowed between updates of the Current Rate value. If
the change between updates is greater than this value, a rate
alarm is generated.
Alarm Deadband Specify the value, in EUs, that defines the size of two inactive
zones: one below the low alarm limit and one above the high
alarm limit.
RBX Alarming Specifies the type of Report By Exception alarming for this
input:
• Disabled – No RBX alarming.
• On Alarm Set – RBX alarm generated when the pulse input
enters an alarm condition.
• On Alarm Clear – RBX alarm generated when the pulse input
leaves an alarm condition.
• On Alarm Set and Clear – RBX alarm generated when the
pulse input enters an alarm condition and when the pulse
input leaves an alarm condition.
Configuration and Use Manual
Comments
Typically set lower than the low
alarm value.
Typically set higher than the high
alarm value.
The Conversion/K-Factor is
automatically applied to the
Current Rate value. Specify a Rate
Alarm value that is appropriately
adjusted.
To disable the rate alarm without
disabling other alarms, set the rate
alarm value greater than the span
of the pulse input.
Prevents recurrent setting and
clearing of alarm when the input
value is oscillating around the
alarm limit. Also prevents filling the
alarm log with repetitive data.
If RBX Alarming is enabled, a
communications port must be
configured for RBX alarming. See
.
Section 4.6
83