Dwyer 8600 User Manual download pdf (Page 32)

949-1277-3 Page 32 December, 1998

Warning: If inhibit is on and a power failure occurs

during a high alarm, restoration of power will not cause

the alarm to occur if the process value does not first

drop below the high alarm setting. Do not use the Alarm

Inhibit feature if a hazard is created by this action. Be

sure to test all combinations of high and low alarm

inhibit actions before placing control into operation.

The following menu items apply only to the alarm.

AL1 Alarm 1 function: Select OFF, Lo, Hi, HiLo, or Evnt.

OFF Alarm 1 is disabled. No Alarm 1 menu items appear in

the Secondary or Secure menus.

Lo Low Alarm Only. A1Lo appears in the Secondary Menu.

Hi High Alarm Only. A1Hi appears in the Secondary Menu.

HiLo High and Low Alarms. Both A1Lo and A1Hi appear in

the Secondary Menu, and share the same Alarm 1 Relay

output.

Evnt Alarm 1 is controlled by the Ramp/Soak program func-

tion. See pages 10-13, and 20 (#A1) for further informa-

tion.

If AL1 is set to OFF, go to AL2 below. If AL1 is set to Evnt, go to A1St below.

A1t Alarm 1 Type: Select AbS or dE

AbS Absolute Alarm that may be set anywhere within the

values of SCAL and SCAH and is independent of SP1.

dE Deviation Alarm that may be set as an offset from SP1.

As SP1 is changed the Alarm Point will track with SP1.

A deviation alarm will also track any active ramp or soak

set point.

A1rE Alarm 1 Reset: Select OnOF or Hold.

OnOF Automatic Reset.

Hold Manual Reset. Reset (acknowledge) by simultaneously

pressing the INDEX & DOWN ARROW keys for 5

seconds.

A1Pi Alarm 1 Power Interrupt: Select On or OFF.

On Alarm Power Interrupt is On.

OFF Alarm Power Interrupt is OFF.

A1iH Alarm 1 Inhibit: Select On or OFF.

On Alarm Inhibit is On. Alarm action is suspended until the

process value first enters a non-alarm condition.

OFF Alarm Inhibit is OFF.

A1St Alarm 1 Output State: Select CLOS or OPEn.

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Dwyer 8600 User Manual Page 32