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Alarm hysteresis, Alarm delay, Alarm hysteresis 147 – Watlow Series D8 User Manual

Page 165: Alarm delay 147, Table 6.15—values for alarm hysteresis 147

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Series D8 User’s Guide

Chapter 6: Menu and Parameter Reference

Doc. 0600-3120-2000

Watlow Anafaze

147

Alarm Hysteresis

Enter the amount by which the process variable must return

within the alarm limit before a high alarm, low alarm or devi-

ation alarm clears. Use the alarm hysteresis to prevent repeat-

ed alarms as the process variable cycles around an alarm limit.

Values:

See Table 6.15 on page 147 for values and decimal

placement. For communications the value is always 0 to 5000.
Default:

See Table 6.15.

DeviceNet Object:

Alarm (67 hex)

Table 6.15

Values for Alarm Hysteresis

Alarm Delay

Use this parameter to delay a failed sensor or process alarm

until the alarm condition has been continuously present for

longer than the delay time.
To delay alarms on powerup only, see Power Up Alarm Delay

on page 128.

Values:

0 to 255 seconds.

Default:

0

DeviceNet Object:

Alarm (67 hex)

Input Type

Display Format

Values

Values via

Communications

Default

Thermocouple

n/a

0 to 500

0 to 5000

2

RTD

n/a

0 to 500.0

0 to 5000

2.0

Process

-999 to 3000

0 to 500

0 to 5000

2

-9999 to 30000

0 to 5000

0 to 5000

20

-999.9 to 3000.0

0.0 to 500.0

0 to 5000

2.0

-99.99 to 300.00

0.00 to 50.00

0 to 5000

0.20

-9.999 to 30.000

0.000 to 5.000

0 to 5000

0.020

-0.9999 to 3.0000

0.0000 to 0.5000

0 to 5000

0.0020

l01 Alarm hys- r
teresisb 2 ˚C

l01 Alarm delayr
b 0 sec