Emerson Micro Motion 3711, Configuration And Use Manual, Page: 80 / 234

72 Micro Motion
®
Model 3711 Gas Flow Computers
Configuring I/O
7.6.3 Discrete Input – Alarms panel
The Discrete Input – Alarms panel is shown in Figure 7-9. Parameters on this panel are listed and
defined in Table 7-8.
Table 7-7 Discrete Inputs – Advanced parameters
Parameter Description Comments
Filter Intervals Used with the Filter parameter to define a time delay in
detecting the discrete input’s On status:
• 0.1 seconds: Each filter interval is 100 milliseconds.
• 15.0: Each filter interval is 15 seconds.
Filter Intervals and Filter apply
only to detection of the On state.
Detection and response to the Off
(inactive) state occurs with no
artificial delay.
Input Controls the polarity of the discrete input, or how the discrete
input represents Closed and Open.
• Normal: On = Closed; Off = Open.
• Inverted: On = Open; Off = Closed.
Filter Defines the number of filter intervals that the discrete input must
remain in the On (active) state before the state is detected and
the discrete input status is defined as On.
Enter a value between 0 and 255:
• 0 requests the shortest possible period.
• 255 requests the longest possible period.
Filter Intervals and Filter apply
only to detection of the On state.
Detection and response to the Off
(inactive) state occurs with no
artificial delay.
Accumulated
Value The number of times the discrete input has switched from Off to
On. Maximum value: 4,294,967,295.
Rolls over to 0 when maximum
value is reached. Can be reset to
any desired start number.
On Counter Displays the number of periods that the Status parameter has
been in the On state. A period is defined as 100 milliseconds. Maximum value: 4,294,967,295.
Rolls over to 0 when maximum
value is reached. Can be reset to
any desired start number.
If Scanning is disabled, the On
Counter does not operate.
Off Counter Displays the number of 100 millisecond periods that the Status
parameter has been in the Off state. Maximum value: 4,294,967,295.
Rolls over to 0 when maximum
value is reached. Can be reset to
any desired start number.
If Scanning is disabled, the Off
Counter does not operate.