LessThan Function Block

The Less Than function compares two inputs. When the first In A is less than the In B, the block outputs"true"; otherwise it outputs "false".

Figure 1: LessThan Function Block

Figure 2: LessThan - Property Sheet

The output is set to "true", if In A < In B.

The output does not change or "false", if In A > (InB + Hyst).

Figure 3: LessThan Logic Diagram

Inputs

Input Name

Description

In A

These are 32-bit floating point input slots.

In B

(In & Par)

These are 32-bit floating point input slots.

Hyst

(In & Par)

This hysteresis value is defined inorder to avoid cycling Output.

Table 1: Inputs of LessThan Function

Output

Output Name

Description

Out

Output = "true" or "false".

Table 2: Output of LessThan Function

Parameter

Parameter Name

Description

In B Par

(In & Par)

If In B is "null", then In B Par is used.

Hyst Par

(In & Par)

If Hyst is "null", then Hyst Par is used.

Out Save

Master Sync Enabled : If you set it to "true" the last output will be set as output for one cycle after the controller restarts. The application can use it to return to the same state before the controller restart.

Out: To enable or disable the Out feature.

Examples

If In A< In B output is set to "true". Hystersis may be defined.

Figure 4: Example - Less Than Function Block and Property Sheet

 

 

Refer to General Description for general information about IRMN4 Function Blocks.