![Omron CJ1G-CPUxx Instructions Manual Download Page 386](http://html1.mh-extra.com/html/omron/cj1g-cpuxx/cj1g-cpuxx_instructions-manual_742491386.webp)
365
Increment/Decrement Instructions
Section 3-10
The Equals Flag will be turned ON if the result is 0000 and the Carry Flag will
be turned ON when a digit changes from 9 to 0.
Both the Equals Flag and the Carry Flag will be turned ON when the content
of Wd changes from 9999 to 0000.
Flags
Precautions
The content of Wd must be BCD. If it isn’t BCD, an error will occur and the
Error Flag will be turned ON.
Examples
Operation of ++B(594)
In the following example, the BCD content of D00100 will be incremented by 1
every cycle as long as CIO 000000 is ON.
Operation of @++B(594)
The up-differentiated variation is used in the following example, so the content
of D00100 will be incremented by 1 only when CIO 000000 has gone from
OFF to ON.
Wd
Wd
Name
Label
Operation
Error Flag
ER
ON if the content of Wd is not BCD.
OFF in all other cases.
Equals Flag
=
ON if the content of Wd is 0000 after execution.
OFF in all other cases.
Carry Flag
CY
ON if a digit in Wd went from 9 to 0 during execution.
OFF in all other cases.
Incremented every cycle
while CIO 000000 is ON.
: Execution of ++B(594)
Increment Increment
Increment Increment
Wd: D00100
Wd: D00100
Incremented only for
up-differentiation.
: Execution of @++B(594)
Increment
Increment
@++B
Wd: D00100
Wd: D00100
Summary of Contents for CJ1G-CPUxx
Page 3: ...iv N o t i c e ...
Page 5: ...vi ...
Page 21: ...xxii Conformance to EC Directives 6 ...
Page 35: ......
Page 1131: ...1110 CJ series Instruction Execution Times and Number of Steps Section 4 2 ...