VR Series: Event & Alarm Description

The Event function & screen display is frequently used for Alarm purpose. Event can also be used for:

Digital output DO
Timer
Totalizer
Counter
Report
Log power up
"CFR21" Higher Security Setting - Log operator actions

Event function and display are set up in the VR Series Configuration described in detail on this site.

This section details Event & Alarm Description, configuration and examples common to Analog Input, Digital Input and

Math function [18 derived channels]. Below is the screen for Analog Input with event/alarm descriptions common

to Digital Input & Math functions.

After entering the Configuration mode, select Channel and press the Enter key to get into Channel mode. It displays the Analog input AI first. Press directional keys <, > at the bottom to select the channel. Afterwards, press directional keys , ¯, ¬, ®, ¿ on the left hand side to select the column.

For information and detail on naming channels, description, Log method, Log speed, Offset, Gain, Range & Scale fields refer to

VR Series Configuration.

Type: There are various types of H, L, HH, LL, R or r to be selected for job or Alarm purpose.

H: High limit. When the process is over high limit, the alarm or job is actuated.

L: Low limit. Any the process is lower than low limit, the alarm or job is actuated

HH: High high limit, to set up another limit higher than high limit for double warning.

LL: Low low limit, to set up another limit lower than low limit for double warning.

R: Increasing rate of change. The job or alarm is actuated when the rate of increasing process value is greater than the specified

rate time interval. For example, when the Setpoint is set to 100_1S, if the process is increasing greater than the value

100 in 1 second, then job or alarm will be actuated.

r: Decreasing rate of change. The job or alarm is actuated when the rate of decreasing process value is greater than the specified

rate time interval. For example, when the Setpoint is set to 50_2S if the process is decreasing greater than the value

50 in 2 seconds, then job or alarm is actuated.

Setpoint: To set up the process value for actuating Job1 and /or Job2

Job1 and Job2 Description: actions, actuators or functions that occur upon PV achieving SP

Job1, Job2: When an event occurs, the task to be performed is called the job.

A typical example is to trigger an alarm buzzer in event of high temperature.

Each pen can accept four events (or alarms) and each event can create two jobs.

Please note that a job under Event is different from a job by pressing the Operate key.

The former is actuated by an event, and the latter is actuated by manual control, no event necessary.

Various types of jobs can be selected:

No Action: Do nothing.

Log Alarm: Record alarms

Log Event: Record events

Stop logging: Stop logging data.

Start logging: Start logging data.

Sound Buzzer: Sound the buzzer. It stops once any key is pressed.

DO Latch On: Set digital output / relay on, and then select Target from DO 1 to DO 6.

The relay is latched when it is activated.

DO Latch Off: Set digital output / relay off, and then select Target from DO 1 to DO 6.

The relay is latched when it is activated.

DO Process: Set digital output / relay on for process high or low, and then select Target from DO 1 to DO 6. The relay is not going to

be latched when it is activated.

Enable Timer: Start the timer, and then select Target from Timer 1 to Timer 6.

Disable Timer: Stop the timer, and then select Target from Timer 1 to Timer 6.

Preset Totalz: Start the totalizer with a preset value, and then select Target from Tolz 1 to Tolz 6.

Reset Totalz: Reset totalizer into zero, and then select Target from Tolz 1 to Tolz 6.

Enable Totalz: Start the totalizer, then select Target from Tolz 1 to Tolz 6.

Disable Totalz: Stop the totalizer, then select Target from Tolz 1 to Tolz 6.

Preset Counter: Start the Counter with a preset value, and then select Target from Cont1 to Cont6.

Reset Counter: Resets the counter into zero, and then select Target from Cont1 to Cont6.

Inc Counter: Increase the counter, and then select Target from Cont1 to Cont6.

Dec Counter: Decrease the counter, and then select Target from Cont1 to Cont6.

Log Report: Make the report for Counter and Totalizer. Choose this column, and then the report will be presented as details described in

Event.

Reset MinMaxAve: In Report function, after logging the MinMaxAve data of AI and Math channels for one day for example, then reset historical data in order to logging new data for the next day.

Hysteresis: To avoid frequent relay activation, the relay hysteresis can set for 0.1% to 10% of full span (Low Scale to High Scale).

Note:

§ The sampling rate of the recorder is fixed at 200 milliseconds, i.e. samples 5 measured data per second.

If the logging speed is set at 1 second in Instant mode, the recorder logs using the last of five measured data values.

For the same speed in Averaging mode, the recorder logs using the average of the five measured data values.

For the same speed in the Maximum or Minimum mode, then the recorder logs using the maximum or minimum of the

five measured data values.

Sampling

Mode Time Logging (historical trend) Display (real time)

Instant 200mS the last of 5 measured data the last of 5 measured data

Averaged 200mS the average of 5 measured data the last of 5 measured data

Maximum 200mS the maximum of 5 measured data the last of 5 measured data