Red Lion LDA - Manual (Page 10)

10


0.0
tON-n
ON TIME DELAY
Enter the time value in seconds that the output is delayed from turning on
after the trigger point is reached. A value of 0.0 allows the meter to update the
output status per the response time listed in the Specifications.
0.0 to 599.9 seconds


0.0
tOF-n
OFF TIME DELAY
0.0 to 599.9 seconds
Enter the time value in seconds that the output is delayed from turning off
after the trigger point is reached. A value of 0.0 allows the meter to update the
output status per the response time listed in the Specifications.
Enter the reset action of the output. See figure for details.
Auto = Automatic action; This action allows the output to automatically reset off
at the trigger points per the Setpoint Action shown in Setpoint Output
Figures. The “on” output may be manually reset (off) immediately by the
front panel RST button or user input.The output remains off until the trigger
point is crossed again.
LAtCH = Latch with immediate reset action; This action latches the output on at
the trigger point per the Setpoint Action shown in Setpoint Output Figures.
Latch means that the output can only be turned off by the front panel RST
button or user input manual reset, serial reset command or meter power cycle.
When the user input or RST button is activated (momentary action), the
OUTPUT RESET ACTION
LAtCH Auto L-dLY


Auto
rSt-n
OUTPUT
STATE
OFF
ON
Hys
SP + Hys
SP
OFF
TRIGGER POINTS
Low Acting (Unbalanced Hys) = LO-Ub
OUTPUT
STATE
OFF
ON
Hys
SP
SP - Hys
OFF
TRIGGER POINTS
High Acting (Unbalanced Hys) = HI-Ub
SETPOINT VALUE
Enter the desired setpoint value. The decimal point position for the setpoint
and hysteresis values follow the selection set in Module 1.
-19999 to 99999


100
SPt-n


2
HYS-n
HYSTERESIS VALUE
1 to 59999
Enter desired hysteresis value. See Setpoint Output Figures for visual
explanation of how setpoint output actions (balanced and unbalanced) are
affected by the hysteresis. When the setpoint is a control output, usually
balanced hysteresis is used. For alarm applications, usually unbalanced
hysteresis is used. For unbalanced hysteresis modes, the hysteresis functions on
the low side for high acting setpoints and functions on the high side for low
acting setpoints.
Note: Hysteresis eliminates output chatter at the switch point, while time delay
can be used to prevent false triggering during process transient events.
5.4 Module 4 - s
etpoInt
o
utput
p
araMeters
(
4-SPt
)
PAR
Setpoint
Action
Setpoint
Select
Setpoint
Value
Output Reset
Action
Hysteresis
Value
Off Time
Delay
On Time
Delay
Output Reset
W/Display
Reset
SPSEL
4-SPt
Act-n SPt-n HYS-n tON-n tOF-n rSt-n rEn-n
Pro
Standby
Operation
Stb-n Enb-n
Setpoint
Enable
PARAMETER MENU
Enter the setpoint (output) to be programmed. The n in the following
parameters will reflect the chosen setpoint number. After the chosen setpoint
is completely programmed, the display will return to
SPSEL
. Repeat steps for
each setpoint to be programmed. Select
NO
to exit the module.
SETPOINT SELECT


NO
SPSEL NO SP-1 SP-2
Select
YES
to enable Setpoint n and access the setup parameters. If
NO
is
selected, the unit returns to SPSEL and Setpoint n is disabled.
SETPOINT ENABLE


NO
Enb-n
YES NO
Enter the action for the selected setpoint (output). See Setpoint Output
Figures for a visual detail of each action.
SETPOINT ACTION


HI-Ub
Act-n
HI-bL LO-bL HI-Ub LO-Ub
High Acting, with balanced hysteresis
Low Acting, with balanced hysteresis
High Acting, with unbalanced hysteresis
Low Acting, with unbalanced hysteresis = HI-bL
= LO-bL
= HI-Ub
= LO-Ub
OUTPUT
STATE
OFF
ON
Hys
SP + ½Hys
SP
SP - ½Hys
OFF
TRIGGER POINTS
High Acting (Balanced Hys) = HI-bL
OUTPUT
STATE
OFF
ON
Hys
SP + ½Hys
SP
SP - ½Hys
OFF
TRIGGER POINTS
Low Acting (Balanced Hys) = LO-bL