Honeywell VRX180 user manual Diagnostics, Unit Data Prompts

Programming Function Blocks and Features

Diagnostics

Data storage for Diagnostics is a complete log of all diagnostic messages. It includes the diagnostic code or identifier message and its time and date of occurrence.

Setup is done with the following parameters: STORAGE MODE, ROLLOVER, DIAG SAMPLES, EXTERNAL ENABLE, SELECT FILENAME. See Table 4-72 for descriptions.

Depending on your selections, data collection will begin when the first diagnostic occurs, or when the first diagnostic occurs after a batch start occurs.

When calibration is executed, the record is time stamped and stored to the diagnostic file. The number of samples which can be stored on a disk (DIAG SAMPLES) can be up to 1600.

Unit Data

Values for up to 12 points (analog input, calculated value, discrete input, discrete output, totalizer, etc.) can be sampled at user-definable intervals and stored on floppy disk. The sample interval must be set by a schedule or triggered by a discrete event. Prompts are described in Table 4-74.

Table 4-74 Unit Data Prompts

Prompt	Range/Selections		Definition
POINTS#1 –	OFF or analog parameter or		Enter up to 12 points.
POINTS#12	discrete parameter
STORAGE MODE	OFF, CONTIN, BATCH, or		Continuous storage becomes active immediately upon
	ON COMMAND		initialization. Batch storage is controlled by a discrete
			parameter (see BATCH CONTROL, page 174) or by
			start/stop batch menu item. Batch data may be started and
			stopped several times in a single file until the file is full.
			Batch start increments a batch number that is stored along
			with the data. The batch number may be used for data
			retrieval and analysis using SDA data analysis software.
			ON COMMAND storage collects a single sample of data
			whenever the EXTERNAL ENABLE discrete makes an off-
			to-on transition. If this mode is used, then SET UP
			SCHEDULE is ignored.
COPY DISPLAY			Copies the data point list already set up for a currently
SETUP			active Unit Data display.
ROLLOVER	ON, OFF		Select ON to continue gathering and storing trend data after
			the Unit data file becomes full. The new data will replace the
			oldest data on the disk as it is collected. No warning will be
			given.
			Select OFF to stop trend storage when trend space
			becomes full. A “DISK FULL” message will then appear.
			Data is buffered until a new disk is inserted and initialized.
UNIT DATA	Enter a value from 0-1600		Number of samples.
SAMPLES
EXTERNAL ENABLE	OFF, discrete parameter, 0, 1	This discrete parameter will allow Unit data storage when
			ON(1) and will stop Unit data storage when OFF(0). This
			enable is independent of the storage mode; it does not
			control batch start/stop.

170 Video Recorder – User Manual