Limit Data Set Up Group; Table 4-2 Limit Group Prompt Definitions - Honeywell UDC3300 Product Manual

4.3

Limit Data Set Up Group

Introduction
Limit group prompts
Table 4-2 Limit Group Prompt Definitions
Lower Display
Prompt
LO or HI
EXT RSET
POWER UP
SP HILIM
SP LOLIM
1/01
Limit control provides a latching output relay which is de-energized
whenever the PV goes above (high limit) or below (low limit) a selected
setpoint value. Reset is through the [RESET] key on the front of the
controller or an optional external switch (Digital Input 1).
Table 4-2 lists all the function prompts in the "LIMIT" Set Up group and
their definitions.
Upper Display
Range of Setting
or Selection
LO LIM
HI LIM
DISABL
ENABLE
EXoNLY
NORMAL
RESET
0 to 100% of span
input in engineering units
with decimal place
0 to 100% of span
input in engineering units
with decimal place
UDC3300 Limit Controller Product Manual
Parameter
Definition
LOW LIMIT CONTROL —The latching output relay de-
energizes when the PV goes below the configured
setpoint. It cannot be reset until the PV rises above the
configured setpoint.
HIGH LIMIT CONTROL —The latching output relay de-
energizes when the PV goes above the configured
setpoint. It cannot be reset until the PV drops below the
configured setpoint.
EXTERNAL RESET —Only available with the Digital Input
option. Allows the controller to be reset from a remote
location by contact closure of a momentary-type switch.
DISABL = External reset is not active.
ENABLE = Enables external reset when Digital Input
option is included in the controller.
EXoNLY = Enables external reset and disables the
keyboard [RESET] key.
POWER UP LOGIC—What condition do you want the
controller to be in at power up.
RESET = Latching relay will have to be reset.
NORMAL = Controller will operate in the same mode as
before power was removed.
SETPOINT HIGH LIMIT —This selection prevents the
setpoint from going above the value selected here. The
setting must be equal or less than the upper range of
input 1.
SETPOINT LOW LIMIT—This selection prevents the
setpoint from going below the value selected here. The
setting must be equal or greater than the lower range of
input 1.
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