Configuration
3/07 UDC3500 Universal Digital Controller Product Manual 167
Function Prompt
Lower Display
Selections or
Range of Setting
Upper Display
Parameter
Definition
Alarm prompts for
Healthwatch Option
TIMER1
TIMER2
TIMER3
COUNT1
COUNT2
COUNT3
TIMER 1—Healthwatch Maintenance Timer 1
TIMER 2—Healthwatch Maintenance Timer 2
TIMER 3—Healthwatch Maintenance Timer 3
COUNT 1—Healthwatch Maintenance Counter 1
COUNT 2—Healthwatch Maintenance Counter 2
COUNT 3—Healthwatch Maintenance Counter 3
ATTENTION See NOTE 9 and NOTE 10.
ATTENTION
NOTE 1: When the controller is configured for Three Position Step Control, alarms set for Output will not
function.
NOTE 2: Alarm 1 is not available if the Timer is enabled because Alarm 1 is dedicated to Timer output.
NOTE 3: This Deviation Alarm is based upon deviation from whichever Local or Remote SP is active.
NOTE 4: Loop Break alarms monitor the selected control loop to determine if it is working. When enabled,
the control output is checked against the minimum and maximum output limit settings. When the output
reaches one of these limits, a timer begins. If the timer expires and the output has not caused the PV to
move by a pre-determined amount, then the alarm activates, thus signaling that the loop is broken. The
loop break timer value must be configured by the operator as the AxSx VAL entry. This value is in
seconds with a range of 0 to 3600 seconds. A setting of 0 is equivalent to an instantaneous loop break
when the output reaches one of its limit values.
The amount of PV Movement required is determined by the “UNIT” setting in the Display Setup Group.
For the Degrees F configuration, the PV must move by 3° in the time allowed. For the Degrees C
configuration, the PV must move by 2°in the time allowed. For the “NONE” selection, the PV must move
1% of the PV range in the time allowed.
Loop Break alarms do not have a HIGH/LOW State configuration, they are always assumed to be a HIGH
state alarm.
Only one alarm setpoint should be configured for Loop Break. If more than one is assigned, only one will
function as intended and the others will not operate.
NOTE 5: Thermocouple Warning means that the instrument has detected that a Thermocouple input is
starting to fail. This alarm also triggers if the Thermocouple further degrades to the Thermocouple Fail
stage or if the input fails. Not valid for input types other than Thermocouple types.
NOTE 6: Thermocouple Failing means that the instrument has detected that a Thermocouple input is in
imminent danger of failing. This alarm also triggers if the input fails. Not valid for input types other than
Thermocouple types.
NOTE 7: For Totalizer Alarms, the Alarm Setpoint value is based upon the configured Totalizer Scale
Factor (See Section 3.12).
For example:
Totalizer Scale Factor: *E4 = 1 x 10
4
= 10,000
Alarm Type: Totalizer
Alarm SP: 400
Alarm High / Low: HIGH
Alarm will activate when the Totalizer Value exceeds 400 x 10
4
= 4,000,000.
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