www.miinet.com
Moore Industries-International, Inc.
- 68 -
User’s Manual
224-790-00K
May 2018
Programmable Limit Alarm Trips
SPA
2
SECTION 5
Note:
When setting Out of Range Lower Point the Lower Point must be less than Lower Range
Value (set in the Senor Range section in Input Tab) and greater than the Lower Sensor Limit.
Additionally when setting the Out of Range Upper Point the Upper Point must be greater than the
Upper Range Value (set in the Senor Range section in Input Tab) and less than the Upper Sensor
Limit.
Delay–
When your unit is in an alarm condition, the delay is the amount of time you set
(0-120sec) to elapse before a relay trip. Enter your delay time into the “Delay” text box. This is
not applicable when using Rate of change or Stuck Input alarms.
Fail Safe/Non Fail Safe–
A Fail Safe alarm, if in the alarm condition, will remain in the alarm
condition even if power to the unit is removed. Its alarm trip relays are energized whenever the
process input is in a non-alarm condition (including any dead band setting). These relays
de-energize when the process input trips the alarm.
Non Fail Safe alarm trip relays are energized whenever the process input is in an alarm condition.
These relays de-energize when the process input returns to the reset point (including any dead
band). To Select a Fail Safe or Non Fail Safe alarm, and click the corresponding button.
Latching–
The alarm will latch after being activated and requires a manual reset. Select the
“Latching” check box if you choose this alarm type.
Manual Reset
A latching alarm requires a manual reset. There are two connections labeled “MR” on the SPA
2
top terminal block. These terminals work in-conjunction with the latching alarm function.
When a SPA
2
is configured with latching alarms, an alarm condition will not “clear”, that is, the
relay will not change state, until the input returns to a non-alarm state
AND
these manual reset
terminals are shorted.
Note:
The alarm latching function is effectively disabled if the manual reset terminals remain
shorted.
Trip Alarm
Choosing the Trip Alarm, you are prompted to complete the following fields:
Trip Point–
The reference value used for notification.
In choosing your limits you are setting the parameters for your unit to notify you if your process input
drops below (Low Alarm) or exceeds (High Alarm) your trip point setting.
1. Select the “High Alarm” or “Low Alarm” button.
2. Enter the value you wish set as the trip point in the “Trip Point” text box.
Dead Band–
The Dead Band is the range in which an alarm relay remains in an alarm condition even
after the monitored process variable input has returned to a safe level, at or below/above the trip point
setting.
1. If choosing to use a dead band value, enter it into the “Dead Band” text box
Note:
Once you have configured all parameters, download to the unit by selecting “Download” in the
Transfer dropdown menu located in the Status Bar. Or, click the button in the Tool Bar.
