Honeywell VRX180 user manual Trend Data 2, 3, Alarms, Stored Events

Programming Function Blocks and Features

Trend Data 2, 3 & 4

Trend Data 2, Trend Data 3 and Trend Data 4 use the same prompts as in Table 4-72.

Alarms

Alarm data storage consists of a complete log of alarms, including time of occurrence, time of clearing, value of the alarm parameter, the alarm sense (high, low, etc.) and the batch identification number, if present. The alarm prompts are: STORAGE MODE, ROLLOVER, ALARM SAMPLES, EXTERNAL ENABLE, SELECT FILENAME. See Table 4-72 for descriptions.

The number of samples which can be stored in a file (ALARM SAMPLES) can be up to

1600. Depending on your selections, data collection will begin when the first alarm occurs, or when the first alarm occurs after a batch start.

Events

Event storage consists of a complete log of events including the event title, time of occurrence, the status or value after the change, and the batch identification number, if present. When event storage is running, loop and instrument mode events are always stored; discrete input and output events are stored only if first enabled under those items’ program menus (see Sections 4.10 and 4.11).

	Table 4-73 Stored Events
Event title			Event status/value
Setpoint choice		SP1, SP2
Control action		Forward, Reverse
Tuning Set		Set 1, Set 2
Instrument Mode		Online, Program, Maint
Control Mode		Auto, Manual, RMan
Set point 1			SP1’s value
Set point 2			SP2’s value
Control Output			Loop’s output value
Discrete Input		On, Off
Discrete Output		On, Off

Event storage setup is done with the following parameters: STORAGE MODE, ROLLOVER, EVENT SAMPLES, EXTERNAL ENABLE, SELECT FILENAME. See Table 4-72 for parameter descriptions.

The number of samples which can be stored in a file (EVENT SAMPLES) can be up to 1600.

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

Barcode data is also stored in the event file.

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