Filter
Top Products
7. Basic Commands
LDP, LDF, ANDP, ANDF, ORP, ORF
- 114 -
{ LDP, LDF, ANDP, ANDF, ORP, ORF ... Pulse operation start, pulse series connection, pulse
parallel connection
Usable device
Bit device Word device
Con-
stant
Pointer
X Y M L F BSB T SM VTCDRWSWZSDKH P
Digit
desig-
nation
Index
No. of
steps
{ { { { {
{ {
{
6
Setting data
S
Device used as
contacts
S
S
S
S
S
S
LDP
LDF
ANDP
ORF
ANDF
ORP
Function
LDP, LDF
(1) LDP is the leading edge pulse operation start command, and is ON only at the leading edge of
the designated bit device (When it turns from OFF to ON).
If a word device has been designated, it is ON only when the designated bit changes from 0 to 1.
In cases where there is only an LDP command, it acts identically to commands for the creation of
a pulse that are executed during ON (
P).
A
ladder using an LDP command
A
ladder not using an LDP command
X0
D0K0 MO
M0
X0
X0
D0
K0MOV
X0
M0
PLS
(2) LDF is the trailing edge pulse operation start command, and is ON only at the trailing edge of the
designated bit device (when turns from ON to OFF).