31.8.1 CTU and CTUP (Up Counter)

Symbols and Features

Ladder Instruction Name

Ladder Symbol

Feature

Number of Steps

CTU
(Up Counter - Level Sensitive)

Counter

2

 

Ladder Instruction Name

Ladder Symbol

Feature

Number of Steps

CTUP
(Up Counter - positive transition)

Counter

2

 

31.8.1.1 Explanation of the CTU and CTUP Instructions