Emerson Rosemount 56, Инструкция по эксплуатации

Страница: 51 / 136

Instruction Manual Section 5: Programming Basics
LIQ-MAN-56 April 2017
Programming Basics 41
The following relay functions can be programmed to any relay from the Configure Relay screen:
1. assign a relay
2. define a relay function
3. assign a Measurement
4. set relay logic
5. enter setpoints
6. set deadband
7. set normal state
8. set USP Safety level (contacting conductivity)
To program these relay functions, access the Configure Relay screen by pressing
ENTER/MENU from the main Relay programming screen.
1. To assign a relay, highlight the desired Relay 1-4 and press ENTER/MENU.
2. To define a relay function, select
from Setpoint, Interval Timer, TPC,
Bleed and Feed, Water Meter, Delay
timer, Date and Time, Fault or None
and press ENTER/MENU.
3. To assign a measurement to a
specific relay, select the desired
measurement or temperature input
and press ENTER/MENU.
4. To set relay logic to activate alarms
at a High reading or a Low reading,
select high
or low and press ENTER/MENU.
5. To enter setpoints for relays, enter the desired value for the process measurement
or temperature at which to activate an alarm event and press ENTER/MENU.
6. To set deadband as a measurement value, enter the change in the process value needed
after the relay deactivates to return to normal (and thereby preventing
repeated alarm activation) and press ENTER/MENU.
7. To set the Normal alarm condition, select 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.
8. To set USP Safety, enter the percentage below the limit at which to activate the alarm
and press ENTER/MENU. NOTE: USP Safety only appears if a contacting
conductivity board is installed.