Honeywell UDC3300 Product Manual

50 UDC3300 Limit Controller Product Manual 1/01
5.4 How to Operate Your Limit Controller, Continued
Operating principles
The UDC3300 Limit Controller accepts signals from such sources as
thermocouples (T/Cs), Resistance Temperature Detectors (RTDs),
milliamps, millivolts, and volts dc. The equivalent PV signal is compared
with the limit setpoint and any error (difference) de-energizes a limit
output relay. When de-energized, the output relay locks out and remains in
this state until the PV input signal drops below the high limit setpoint or
rises above the low limit setpoint, and the controller is reset manually
from the front of the controller or through an optional external switch.
Setting a display
mode
When an alarm condition exists, there are three display modes from which
to choose:
Press [LOWER DISPLAY] key to successively select one of the following
three modes.
DISPLAY MODE #1
Upper Display = the value of the PV
Lower Display = the limit control setpoint value
DISPLAY MODE #2
Upper Display = (blank)
Lower Display = the limit control setpoint value
DISPLAY MODE #3
Upper Display = (blank)
Lower Display = LIMIT OK
Viewing limit action
duration or peak PV
value
When an alarm condition exists, you can view the parameters listed in
Table 5-4.
Table 5-4 Limit Action Duration or Peak PV Value
To View Press Lower Display Shows
Limit Action
Duration
LOWER
DISPLAY
the limit action duration in hours:minutes as “TIME
XX.XX”.
Peak PV Value
LOWER
DISPLAY
the highest PV value reached for a high limit
controller, or the lowest PV value reached for a low
limit controller as “PK XXXX”.
Continued on next page

Honeywell UDC3300 Specifications

General

Brand	Honeywell
Model	UDC3300
Category	Controller
Language	English