Delta DVP-15MC Series, Operation Manual

Page: 143 / 972

DVP-15MC Series Motion Controller Operation Manual
8-56
_8
FB/FC
Explanation Applicable model
FB CTD is used as a down counter.
DVP15MC11T
DVP15MC11T-06

Parameters
Parameter
name
Meaning
Input/
Output
Description Valid range
CD
Down-counter
input signal
Input Control the counter to start counting down TRUE or FALSE
Load Load signal Input For writing the down-counter value TRUE or FALSE
PV Preset value Input Counter setting value 0 ~ 4294967295
Q Output signal Output
Q is TRUE when the counter counts
down to 0.
TRUE or FALSE
CV Counter value Output Counter present value 0 ~ 4294967295
B
oo
le
an
Bit string Integer
Real
number
Time, date
S
tr
in
g
B
OOL
BYT
E
WO
R
D
DW
O
RD
LW
O
R
D
US
INT
UI
NT
UDI
NT
UL
INT
SI
N
T
IN
T DI
NT
LI
N
T
R
EA
L
L
R
E
AL
T
IME
D
AT
E
T
O
D
DT
S
T
RI
NG
CU
●
Load
●
PV
●
Q
●
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.
CTD
EN E NO
Q
CTD_ins ta nce
CD
Load
CV
PV