Alarm type and action – Dwyer 32DZ User Manual

Page 11

June, 2000

Page 11 of 40

949-1318

PROGRAMMING SET POINTS FOR ALARM FUNCTIONS

Caution: In any critical application where failure could
cause expensive product loss or endanger personal
safety, a redundant limit controller is required.

The 32DZ Series allows Zone 1 and / or Zone 2 to operate as limit or alarm
type outputs. This function is available on both outputs. To enable a zone
output to act as an alarm or limit,

Out1

(for Zone 1) or

Out2

(for Zone2) should

be set for

OnOf

When

Out1

and / or

Out2

are set to

OnOF

, then the alarm function menu items

will appear in the Secure Menu for the selected zone(s).

When Set Point Power Interrupt (

) is programmed

and Set Point

Reset (

) is programmed for

Hold

, the alarm will automatically reset

after a power failure and on subsequent power restoration if no alarm
condition is present.

If Set Point Inhibit (

) is selected

, an alarm condition is suspended

upon power up until the process value passes through the alarm set point
once. Alarm inhibit can be restored as if a power up took place by pressing
both the

INDEX and

ENTER keys for 5 seconds.

Warning: If inhibit is on and a power failure occurs
during a high alarm, on restoration of power inhibit will
suppress the alarm. Do not use the Set Point Inhibit
feature if a hazard may be created by this action. Be sure
to test all combinations of high and low set point inhibit
actions before placing control into operation.

Menu items that are dedicated to either Zone 1 or Zone 2 will have either
a 1 or 2 in them for identification.

Edit

is set to any value other than

, the setting will be retained for

a period of five minutes to allow handy, repeated access to that zone's
menues. After five minutes of keypad inactivity, the

Edit

setting will

revert to

, giving an added layer of security to prevent inadvertant

changes to the instrument.