Chapter 16 PLC Function Applications│CFP2000
16-42
Upper/lower differential output commands
Command
code
Function OPERAND
Execution
speed (us)
PLS Upper differential output
Y
, M
1.2
PLF Lower differential output
Y
, M
1.2
Stop command
Command
code
Function OPERAND
Execution
speed (us)
END Program conclusion N/A 0.2
Other commands
Command
code
Function OPERAND
Execution
speed (us)
NOP No action N/A 0.2
INV Inverse of operation results N/A 0.2
P Index P 0.3
16-6-2 Detailed explanation of basic commands
Command Function
LD
Load contact a
Operand
X0–X17 Y0–Y17 M0–M799 T0–159 C0–C79 D0–D399
-
The LD command is used for contact a starting at the left busbar or contact a starting
at a contact circuit block; its function is to save current content and save the acquired
contact status in the cumulative register.
Ladder diagram:
X0
X1
Y1
Command code: Description:
LD X0
Load Contact a of X0
AND X1
Create series
connection to contact a
of X1
OUT Y1 Drive Y1 coil
Command Function
LDI
Load contact b
Operand
X0–X17 Y0–Y17 M0–M799 T0–159 C0–C79 D0–D399
-
The LDI command is used for contact b starting at the left busbar or contact b starting
at a contact circuit block; its function is to save current content and save the acquired
contact status in the cumulative register.
Ladder diagram:
X0
X1
Y1
Command code: Description:
LDI X0
Load Contact b of X0
AND X1
Create series
connection to contact a
of X1
OUT Y1 Drive Y1 coil