Delta AH500 series Manual download pdf (Page 31)

AH500 Quick Start

Users can see a new piece of data.

Users can create the global symbols for the data in the table above in the same way. (For the analog

module, the data type is a real floating-point number. Therefore, the symbol occupies two data

registers, and the address in the

Address

box is the initial address.)

2.8

Creating Function Blocks

The procedure in this example is to create a function block first. Users also can create the main

program first. There is no absolute relation between the function block and the main program. They

are actually executed alternately. However, users are recommended to create a function first when

the function is used repeatedly.

The control relation among the underground pool, the water tower, and the pump can be

represented by a function block. There are usually two water systems in a multi-storey building. If

users create the function blocks, they only need to change the variables of the input pins and those

of the output pins to complete the second water system.

Users can create a function block which contains the relation among the underground pool, the

water tower, and the pump. Right-click

in the window at the left side of the main

screen of the software to add a new POU.

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Delta AH500 series Manual Page 31