Warm Start Time - Honeywell VPR100 User Manual

8.11 Warm Start Time

The instrument will start up in one of three modes based on the length of time power is off.
First Time Start
First time start occurs when the unit is being powered up for the first time or when the memory clear
services maintenance routing is executed. All configuration and calibration is cleared and all parameters are
set to factory defaults. See "DATABASE SERVICES" Section 8.7.
Cold Start
Cold start occurs when the unit is without power for a period longer than 90 minutes or if the reset unit
maintenance routine is executed. See Section 8.8 Reset Unit. In cold start operation, all RAM buffers
(storage and display) are cleared and accumulated values of some function blocks (Calculated Value timers,
totalizers, and control loop integral) are reset to initial values. The cold start operation retains the loop
operating status of auto or manual and setpoint 1 or setpoint 2. The loop output will be set to zero (0) unless
configured to use a Failsafe value for the analog output.
No Data collected and stored to floppy disk before the onset of cold Start is lost.
Data storage is automatically resumed after a Cold Start; a maximum of 1 minute of buffered data will be
lost due to a Cold Start. If a new disk was inserted into the floppy drive while power was off, you must
initialize the new disk to resume data storage.
Warm Start
If power is off for less than 90 minutes, a warm start will be used during power-up. All buffered data prior
to power loss is retained and accumulated values in Calculated Value timers and totalizers are retained.
Control loop output values are also retained. Setpoint Profilers resume where they left off. If power is off
for more than the warm up start time, a cold start operation will occur.
Warm start times available (in minutes): 1, 2, 3, 4, 5, 10, 15, 20, 30, 60, 90, None
Note that all data storage schedules that have been initialized or started via the ON LINE mode DATA
STORAGE SETUP menu will automatically resume their execution upon the occurrence of a Warm Start.
12/00 VPR & VRX – User Manual
Maintenance
261