Delta Electronics AH500, Руководство пользователя

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C h a p t e r 4 B a s i c I n s t r u c t i o n s
Instruction code Operand Function
PLF S Falling-edge output
Device X Y M S K 16# F KnM KnS D W T C V Z
S
 
E xp la nat io n

PLF is a falling-edge output instruction. When X0.0 is turned from ON to
OFF, the instruction PLF is executed. MO sends a pulse for a scan
cycle.
E xa mple
Ladder diagram
X0.0
M0 PLF
M0
Y0.0 SET
Timing diagram:
On e sca n cycle
X0 .0
M0
Y0 .0
Instruction code: Description:
LD X0.0
Loading the
Form A contact
X0.0
PLF M0
M0 is falling
edge-triggered.
LD M0
Loading the
Form A contact
M0
SET Y0.0
Y0.0 remains
ON.
Instruction code Operand Function
P - Pointer
E xp la nat io n

A pointer indicates a subroutine. It is in the range of P0 to P255.

A pointer can be used by API 00 CJ, API 01 CALL, API 256 CJN, and
API 257 JMP. The pointers used do not have to start from P0. A pointer
number can not be used repeatedly, otherwise an unexpected error will
occur.
E xa mple
Ladder diagram
X0.0
Y0.1
P10
X0.1
P10
CJ CJ
Instruction code: Description:
LD X0.0
Loading the Form
A contact X0.0
CJ P10
The jump
instruction CJ
specifies P10.
:
P10 Pointer P10
LD X0.1
Loading the Form
A contact X0.0
OUT Y0.1
Driving the coil
Y0.1
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