32.8.2 CTD and CTDP (Down Counter)

Symbols and Features

Ladder Instruction Name

Ladder Symbol

Feature

Number of Steps

CTD
(Down Counter -
Level Sensitive)

Counter

2

 

Ladder Instruction Name

Ladder Symbol

Feature

Number of Steps

CTDP
(Down Counter -
positive transition)

Counter

2

 

32.8.2.1 Explanation of the CTD and CTDP Instructions