Menu items that are dedicated to either Zone 1 or Zone 2 will have either a 1 or 2 in them for identification.
If Edit is set to any value other than 0, 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 0, giving an added layer of security to prevent inadvertant changes to the instrument.
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 C N 74000 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 Out1and / or Out2are 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 (S#Pi) is programmed ON and Set Point Reset (S#rE) 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 (S#iH) is selected ON, 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.
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