Emerson Rosemount 56, Инструкция по эксплуатации

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Instruction Manual Section 9: Alarm Relay Functions
LIQ-MAN-56 April 2017
Alarm Relay Functions 73
Interval time has expired, the analyzer activates hold mode on the assigned measurement
and the relay is energized for the On time period.
A schematic of the Interval timer operation is shown:
9.6.2 Setup
Access Interval timer by pressing ENTER/MENU from the main screen and then
Program/Relays/ Configure Relay. From the main relay programming screen, program this
feature as follows:
1. Relay: Assign a relay by highlighting the desired relay 1-4 and press ENTER/MENU.
2. Type: Select Interval timer as the relay type and press ENTER/MENU.
3. Interval time: Enter the time in hours (XX.X hours) between complete interval cycles.
4. On time: Enter the time in minutes (X.X min) for the relay to remain energized. The
assigned measurement value will be on hold during this time.
5. Recovery time: Enter the time in minutes (XX min) before the process is restored and
live measurements can resume.
6. *Hold while active: Select which sensors outputs should be on hold (S1, S2 or both)
during the interval timer activation time. Press ENTER/MENU.
7. Select NEXT Press ENTER/MENU to advance to the next setup screen.
8. Normal state: Set the normal alarm condition as Open or Closed and press
ENTER/MENU. Program the normal state to define the desired alarm default state to
normally open or normally closed upon power up.
*56 units with software ver. 2.1X and greater allow override of interval timer to ensure that all relays and outputs are held if desired.
Figure 9-5. interval timer Alarm operation
time
interval time
on time
hold
recovery
time
Relay Function Limits and Selections Default
Interval timer NA NA
Interval time 0 to 999.9 hr 24.0 hr
On time 0 to 999.9 sec 10 sec
Recovery time 0 to 999 sec 60 sec
Hold while active 0 to 999 sec 0 sec
Normal state Sensor 1, Sensor 1, both Sensor 1
Table 9-6. Defaults and programmable limits