Introduction

This quick guide discusses the Greater Than or Equal (referred to as ‘GTOE’ below) and Less Than or Equal (‘LTOE’ below) functionality available on Irisys Vector Analytic devices.

In order to access these settings, you must first make an initial connection to the Vector unit; see separate guide: Irisys Vector 4D - Making a Setup Connection

Greater Than/Less Than Basics

These are simple binary, or ‘flag’, type registers which can be used to indicate when certain threshold or upper/lower limit conditions have been met. Essentially, they are used in conjunction with other register types to flag when a value has been reached, for example, a maximum line count value, or maximum occupancy total.

Because they are binary registers, they can only ever be: 0 (zero), when the alarm value has not been reached; or 1 (one), once the alarm value has been reached/exceeded.

The GTOE register type is therefore ideal for alarm applications involving maximum occupancy, or airlock rules of a minimum of 2 people, for example.

When used with the optional USB-IO module each one can be used to set a relay output high or low to indicate the alarm event. The relay output will then sit high (or low) when the limit is reached.

The GTOE and LTOE registers are often used together, especially when the IO module relay outputs are utilized to drive traffic lights, for example. In this way one relay output can drive the red light so that it illuminates when the GTOE register reaches the configured maximum occupancy value, and the other relay output can drive the green light so that it illuminates when the occupancy value drops below that value.

Note that these register types are only available on Vector ‘Analytic’ and are not available on Vector ‘Count’ devices.

If connected to a Vector via an Estate Manager connection, make sure you select the ‘Live View’ option to make changes

Instructions

If you are using the register in conjunction with occupancy or another register type, add and configure that register before proceeding.

Click the plus sign on the ‘Registers’ dialog (+) and choose the ‘Greater Than or Equal’ Register, and click ‘Next’.

Give the register a unique name, and click ‘Next’.

Select the relevant register to monitor. In this example we are using the GTOE register to flag when an Occupancy register reaches a maximum value of 100 people:

 

Enter the value that needs to be reached to ‘alarm’.

 

Click the ‘Next’ button once complete.

Lastly, click the ‘Add Register’ button.

If you want to drive red and green traffic lights add a GTOE and an LTOE register as shown here (“Max Limit” and “Occupancy OK”):

If the GTOE alarm value is 100, then the LTOE alarm value should be 99 (one less).

Relay Configuration

If a relay output is required, click the ‘Relays’ tab. If you don’t see the Relays tab, ensure your USB-IO is properly connected.

Configure the following settings*. Note that the GTOE register and the LTOE register should be assigned to the same Relay output:

*Default State setting dependant on interfacing requirements.

 

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