Ctd - Delta Electronics DVP15MC11T Operation Manual

DVP15MC11T Operation Manual
8.7.2

CTD

FB/FC
FB CTD is used as a down counter.

Parameters
Parameter
name
Down-counter
CD
input signal
Load Load signal
PV Preset value
Q Output signal
CV Counter value
●
CU
●
Load
PV
●
Q
_8
CV
Note:
The symbol ● indicates that the parameter is allowed to connect to the variable or constant of the data type.

Function Explanation

CTU functions as a down counter.

When Load is reset to FALSE after being set to TRUE, the value of PV is written to CV. When CD
changes from FALSE to TRUE, the counter makes the counter value decreased once and the value
of CV is decreased by 1. When the value of CV reaches 0, Q is TRUE.

Precautions for Correct Use
While Load is TRUE, the counter will not count down.
8-48
Explanation
Input/
Meaning
Output
Input
Input
Input
Output
Output
Bit string
CTD_insta nce
CTD
EN E NO
CD
Q
Load
CV
PV
Description
Control the counter to start counting down TRUE or FALSE
For writing the down-counter value
Counter setting value
Q is TRUE when the counter counts down
to 0.
Counter present value
Integer
●
●
Applicable
model
DVP15MC11T
Valid range
TRUE or FALSE
0 ~ 4294967295
TRUE or FALSE
0 ~ 4294967295
Real
Time, date
number