Honeywell VRX180 user manual Data Storage, Categories of Stored Data

Programming and Operating Concepts

3.15 Data Storage

This instrument supports either floppy 1,44 MB or 100 MB ZIP disks. Note that only DOS formatted floppy disks may be used in the instrument’s disk drive and the unit’s front door must be closed for any disk drive operations to take place. The floppy disks may be initialized in the instrument or on an IBM- PC with the initialize utility.

Read this overview thoroughly to understand the fundamentals behind the instrument’s data storage capabilities.

Categories of Stored Data

There are four categories of disk storable data. Each category of data is stored in its own unique file. The categories are:

Data Storage

Configuration Storage

Setpoint Program Storage

Calibration Storage

Da ta Storage		Co nfi guratio n	Setpoint Progra m	Ca lib ration
Proces s Data	Di agno s tic Data
Tre nd s
Un i t Data
Ala rm s
Eve nts

Figure 3-28 Categories of Stored Data

The first category of stored data, Data Storage, is comprised of two types of data: process data and diagnostic data. When the instrument stores these data types it is essentially functioning as a recorder.

Process data is comprised of up to four files containing historical information on the process that the instrument is monitoring and/or controlling, such as the temperature trend or a log of a furnace over time. Process data also includes any alarm or discrete event information.

Diagnostic data is the result of the instrument’s execution of diagnostic routines during instrument start- up and maintenance procedures (such as calibration). Online operation is also monitored to detect both process faults and internal electronic errors. If a diagnostic error occurs, a record of it can be stored to a single diagnostic file.

The second category of stored data is configuration storage, which is a single file comprised of the instrument’s programming and configuration. Configuration storage includes the programming of the instrument’s analog input characteristics, the configuration of its control loops, or, perhaps, the programming of any math or logic functions.

The third category of stored data is Setpoint Program storage, which is a single file –a setpoint program– containing one to eight setpoint profiles, depending on the instrument. Recall that set point profiles are user specified plots of process values against time that are divided into ramp and soak segments of varying time lengths. Setpoint programs may be stored to disk or to the instrument’s memory.

The fourth category of stored data is calibration storage, which is a file containing the instrument’s analog input and output calibration. This file may be used to restore calibration in the event that a full calibration, using a calibration source and/or meter, cannot be performed.

74 Video Recorder – User Manual