Emerson Rosemount 54eA Manual page 39

MODEL 54eA
5.6 CHANGING OUTPUT PARAMETERS (continued)
Output 2 control
Output 2 setup
Hold feature setup
Exit
32
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Integral: Integral is the number of seconds over which devia-
tions from the setpoint are integrated to remove continuing off-
sets. Smaller values provide higher response.
Derivative: Derivative is a form of control that resists all changes
in readings. Higher readings increase the derivative function. To
prevent process oscillation, use caution in setting the derivative
value.
Range: Choose 4-20 mA or 0-20 mA.
For an explanation of Hold, Fixed Hold, and Fault, see step 8b
above.
For allowed values, see Table 5-1.
For more information using PID control, see Section 13.0.
10. Hold setup.
a. Move the cursor to "Hold feature setup" and press Enter (F4).
b. Press Edit (F4). Use the
feature", "Enable feature", and "20 min timeout". If "20 min time-
out" is selected, hold mode will automatically disengage after
being on for 20 minutes.
Enter
Selecting "Enable hold" or "20-min timeout" does not put
the controller in hold. It only allows the user to put the
controller in hold when the controller is in calibrate mode.
11. Using hold.
If hold was enabled in step 10 above, the hold screen will appear as
soon as the user enters the Calibrate menu. To activate Hold, press
Edit (F4). Use the
"Hold Mode Activated" will be displayed. Outputs and relays will go to
the values programmed in step 8b.
"Hold Mode Activated" will continue to flash in the main display even
after the user has left the Calibrate menu. To deactivate hold, enter
the Calibrate menu and press Edit (F4). Use the
to Off and press Save (F4). Press Exit (F1) twice to return to the main
display.
SOFTWARE CONFIGURATION
to scroll through the choices: "Disable
NOTE
key to change Off to On and press Save (F4).
SECTION 5.0
key to change On