PAXUSB00 datasheet(25/36 Pages) REDLION

25 / 36 page

Enter desired hysteresis value. See Setpoint Alarm Figures for visual

explanation of how setpoint alarm actions (balance and unbalance) are affected

by the hysteresis. Depending on the Setpoint Action, , the value may be

affected by the input rounding factor,  . When the setpoint is a

control output, usually balance 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.

















HYSTERESIS VALUE



to 



to 

SETPOINT VALUE

When , the alarm is disabled (after a power up) until the trigger point is

crossed. Once the alarm is on, the alarm operates normally per the Setpoint

Action and Reset Mode.

















OFF TIME DELAY

ON TIME DELAY



to  sec.









OUTPUT LOGIC













RESET ACTION









to  sec.









STANDBY OPERATION





Enter desired setpoint alarm value. These setpoint values can also be entered

in the Display Mode during Program Lock-out when the setpoint is programmed

as  in Parameter Module 3. Depending on the Setpoint Action, , the

value may be affected by the input rounding factor,  . When a

setpoint is programmed as deviation or band acting, the associated output tracks



as it is changed. The value entered is the offset, or difference from .

Enter the time value in seconds that the alarm is delayed from turning on after

the trigger point is reached. A value of 0.0 allows the meter to update the alarm

status per the response time listed in the Specifications. When the output logic

is , this becomes off time delay. Any time accumulated at power-off resets

during power-up.

Enter the time value in seconds that the alarm is delayed from turning off after

the trigger point is reached. A value of 0.0 allows the meter to update the alarm

status per the response time listed in the Specifications. When the output logic

is , this becomes on time delay. Any time accumulated at power-off resets

during power-up.

Enter the output logic of the alarm output. The  logic leaves the output

operation as normal. The  logic reverses the output logic. In , the alarm

states in the Setpoint Alarm Figures are reversed.

Enter the reset action of the alarm output.



= Automatic action; This action allows the alarm output to automatically

reset off at the trigger points per the Setpoint Action shown in Setpoint Alarm

Figures. The “on” alarm may be manually reset (off) immediately by a front

panel function key or user input.The alarm remains reset off until the trigger

point is crossed again.



= Latch with immediate reset action; This action latches the alarm

output on at the trigger point per the Setpoint Action shown in Setpoint Alarm

Figures. Latch means that the alarm output can only be turned off by front

panel function key or user input manual reset, serial reset command or meter

power cycle. When the user input or function key is activated (momentary or

maintained), the corresponding “on” alarm output is reset immediately and

remains off until the trigger point is crossed again. (Previously latched alarms

will be off if power up Display Value is lower than setpoint value.)



= Latch with delay reset action; This action latches the alarm output

on at the trigger point per the Setpoint Action shown in Setpoint Alarm

Figures. Latch means that the alarm output can only be turned off by front

panel function key or user input manual reset, serial reset command or meter

power cycle. When the user input or function key is activated (momentary or

maintained), the meter delays the event until the corresponding “on” alarm

output crosses the trigger off point. (Previously latched alarms are off if

power up Display Value is lower than setpoint value. During a power cycle,

the meter erases a previous Latch 2 reset if it is not activated at power up.)

* Deviation and band action setpoints are relative to the value of setpoint 1.

It is not possible to configure setpoint 1 as deviation or band actions. It is

possible to use setpoint 1 for an absolute action, while its value is being used

for deviation or band.

** The lower Totalizer action  allows setpoints to function off of the

lower 5 digits of the Totalizer. The upper Totalizer action  allows

setpoints to function off of the upper 4 digits of the Totalizer. To obtain

absolute low alarms for the Totalizer, program the  or  output

logic as reverse.

Enter the action for the selected setpoint (alarm output). See Setpoint Alarm

Figures for a visual detail of each action.

SETPOINT ACTION





























Absolute high, with balanced hysteresis

Absolute low, with balanced hysteresis

Absolute high, with unbalanced hysteresis

Absolute low, with unbalanced hysteresis

Deviation low, with unbalanced hysteresis *



Outside band, with unbalanced hysteresis *

Upper Totalizer absolute high, unbalance hysteresis**

















Setpoint always off, (returns to SPSEL NO)

Deviation high, with unbalanced hysteresis *

Lower Totalizer absolute high, unbalance hysteresis**













SETPOINT SOURCE

Selects the meter input value to be used to trigger the Setpoint Alarm. The



setting will cause the setpoint to trigger off of the relative (net) input value.

The relative input value is the absolute input value that includes the Display

Offset Value. The  setting will couse the setpoint to trigger off of the

absolute (gross) input value. The absolute input value is based on Module 1



and  entries. This parameter is not available when  is 

or .

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