Delta DVP-15MC Series - Page 146

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 ENO
QU
CTUD1
CU
CD
QD
Reset
Load
PV
CV
CTUD1_EN
CTUD1_CU
CTUD1_CD
CTUD1_Reset
CTUD1_Load
CTUD1_PV
CTUD1_QU
CTUD1_QD
CTUD1_CV