Toshiba T2N User Manual download pdf (Page 151)

2. User Program Configuration

138 PROSEC T2N

Main program

Sub-program #1

Timer interrupt program

I/O interrupt program #1

I/O interrupt program #2

I/O interrupt program #3

I/O interrupt program #4

Sub-routine

Also, in each program type, the user program is arranged by units called

‘blocks’.

Internally, a block definition label is present at the head of each block.

The program type, block number and programming language

information are in the block definition label (there is no need for the user

to be concerned with the block definition label).

Although the 2 programming languages of ladder diagram and SFC can

be used in combination in the T2N, only 1 language can be used in any

1 block.

1. In each program type and block, there is no limit to the program

capacity (number of steps). The only limit is the total capacity

(23.5K steps).

2. The block numbers need not be consecutive. In other words, there

may be vacant blocks in the sequence.

User Program Configuration

(Program Types)

Program Type Internal Configuration

(Blocks)

Block 1

Block 2

Block 3

Block n

(n = max. 256)

Block 1

1 2 ... 146 147 148 149 150 151 152 153 154 155 156 ... 271 272

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Toshiba T2N User Manual Page 151