Yaskawa YASNAC PC NC PLC Programming Manual - Manual (Page 39)

6 - 3
YASNAC PCNC PLC Programming Manual Chapter 6: PLC Instructions
6.2 Types and List of Instructions
6.2.1 Types of Instructions
With the PLC, the following types of instructions are provided.
(1) Basic Instructions
Relay instruction: 13 types
Register instruction: 37 types
Timer instruction: 2 types
Control instruction: 9 types
Total 61 types
(2) Macro Instructions
Macro instruction: 22 types
Auxiliary instruction: 5 types
6.2.2 List of Instructions
(1) List of Relay Instructions
The list of relay instructions is indicated below.
Instruction Description
RR after
Operation
Reference
Page
LD Reads the signal status (0, 1) and sets it to RR.
Ù
LD-NOT Reads the inversion of signal status (0, 1) and sets it to RR.
Ù
AND
Executes AND between the contact and RR, sets the result
to RR. (Logical product)
Ù
AND-NOT
Executes AND between the inversion of signal status and
RR, and sets the result to RR. (Reverse logical product.)
Ù
OR
Executes OR between the contact and RR, sets the result to
RR. (Logical sum)
Ù
OR-NOT
Executes OR between the inversion of signal status and RR,
and, sets the result to RR. (Reverse logical sum)
Ù
XOR Sets “not-coincide” between the signal and RR to RR.
Ù
XNR Sets “coincide” between the signal and RR to RR.
Ù
STR
Enters the content of RR to the stack register and executes
the LD instruction.
Ù
STR-NOT
Enters the content of RR to the stack register and executes
the LD-NOT instruction.
Ù