Ronan X501NET - Manual (Page 33)

Chapter 2 - Interface
X501NET System Configuration Manual © 2008 Ronan Engineering Company 27
2.8.2.5 Alarm Legend Field
The Alarm Legend Field contains the text to be displayed when the point is in the alarm state.
This legend is displayed as the State Legend on the Points Status page and Current
State on the Point Setup page when the point is in the alarm state.
2.8.2.6 Normal Legend Field
The Normal Legend Field contains the text to be displayed when the point is in the normal
state. This legend is displayed as the State Legend on the Points Status page and
Current State on the Point Setup page when the point is in the normal state.
2.8.2.7 Toggle Legend Field
The Toggle Legend Field contains the text to be displayed when the point is toggling (see
section 2.8.2.14 for a explanation of the criteria for a point to toggling). This legend is displayed
as the State Legend on the Points Status page and Current State on the Point Setup
page when the point is toggling.
2.8.2.8 Polarity Field
The Polarity field is a pull-down menu. The choices in the menu for this field are Normally
open or Normally closed. The value selected represents the state the point is normal
27
.
2.8.2.9 In Service Field
The In Service field is a pull-down menu. The choices in the menu for this field are Yes or No.
Yes enables the point, No disables the point.
2.8.2.10 Filter Type Field
The Filter Type field is a pull-down menu. The choices in the menu for this field are 1, 2, 3, 4,
5, 6, 7, 8, 9, or 10. Each number represents a type of filter. The filter types 1 through 5 are
consecutive filters. The filter types 6 through 10 are integrating filters.
2.8.2.10.1 Consecutive Filter
The consecutive type filter employs a counter for the input, which is activated when the
monitoring system samples the point contact. The contact is scanned every millisecond (1/1000
of a second). The counter begins to tally when a change in the point contact is first detected. If
the specified number of consecutive scans reflect this change, an event is recorded. Should the
point sample return to the original state before the specified number of consecutive scans
elapses, the count returns to zero. The Alarm Time Constant (see section 2.8.2.11) specifies
the count required to enter the alarm condition and the Normal Time Constant (see section
2.8.2.12) specifies the count required to return to normal.
27 When the point is in the opposite state it is in alarm.