VersaPro Temperature Controller
Page 19
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7.3
Alarm Delay Times
Each alarm can have delay ON, delay OFF, or both delays applied. Delays can be applied in increments of a
second, up to a maximum of 250 seconds. ON delays are helpful if a known upset in the process can be
ignored. This avoids nuisance alarms but still maintains an active alarm if the alarm condition persists
following the delay. OFF delays will hold the alarm contact active for a determined period of time once the
alarm condition has cleared. This can be helpful as an interlock to other process functions that may have to
recover following an alarm condition.
7.4 Diagnostic
Alarms
A diagnostic alarm is shown on the instrument’s center display when a fault is detected in the internal
hardware during power up. These alarms included:
FLASH CSUM
A fault has been detected in the Flash memory.
EEPROM CSUM
A fault has been detected in the EEPROM.
KEYBOARD
A key is stuck or was held down during power up.
FLASH ERASE
This error may occur during instrument programming. The Flash memory may be
faulty. Retry programming; make sure the communications link to the instrument is
working properly.
FLASH / EE SIZE
This error may occur during instrument programming. The Flash memory may be faulty.
Retry programming; make sure the communications link to the instrument is working
properly.
If either alarm contact is configured for a fault this alarm will engage if any of the above faults occur. The LCD
display will indicate the fault condition.
The front panel display will show 0000 if the process value is below the display resolution, or HHHH if the
process value is above the display resolution. It may be necessary to adjust the oxygen exponent and/or the
oxygen decimal point settings if these symbols occur.
