Delta DVP-15MC Series, Operation Manual

Page: 146 / 972

Chapter 8 Logic Instructions
8-59
8_
The symbol
●
indicates that the parameter is allowed to connect to the variable or constant of the data
type.

Function Explanation
CTUD is used as an up counter for counting up and a down counter for counting down.

Precautions for Correct Use

The counter will not count down while Load is TRUE.

The counter will not count up while Reset is TRUE.

Programming Example

The variable table and program
Variable name Data type Initial value
CTUD1 CTUD
CTUD1_EN BOOL FALSE
CTUD1_CU BOOL FALSE
CTUD1_CD BOOL FALSE
CTUD1_Reset BOOL FALSE
CTUD1_Load BOOL FALSE
CTUD1_PV UDINT 4
CTUD1_QU BOOL
CTUD1_QD BOOL
CTUD1_CV UDINT
1
CTUD
EN E NO
Q U
CTUD1
CU
CD Q D
Re set
L oad
P V
CV
CTUD1_EN
CTUD1_ CU
CTUD1_ CD
CTUD1_Res et
CTUD1_ Load
CTUD1 _PV
CTUD1 _QU
CTUD1 _QD
CTUD1 _CV