If Statement - Hitachi NT2021XA Instruction Manual

Chapter 2 Syntax

if statement

- Format
Format
if <condition> then
- Explanation
Use this instruction to branch processing conditionally.
When <condition> is met, processing branches to the step labeled with
<condition> : Specifies a conditional expression among those listed in Section 2.2, " List of Instructions (2) Conditional
expressions."
<label name> : Specifies the label name of the branch-target step (line).
- Processing cycle
Note that <condition>
Refer to the statement execution sequence indicated by parenthesized numbers in the comment fields of the sample programs
below.
- Sample program
Label Mnemonic
Yw=
if
if
Y(00)=
goto
LABEL1 Y(01)=
goto
LABEL2 Y(02)=
LABEL3 Y(03)=
Instruction to branch processing unconditionally
When
<label name> <label
When
check and branch processing are executed in the same cycle.
parameter1 parameter2
0
X(00) =
X(01) =
1
LABEL3
1
LABEL3
1
1
Description
<condition> is met, processing branches to the step labeled with
name>.
<condition> is not met, processing proceeds to the next step (line).
<label name>
parameter3 parameter4 parameter5
1 then LABEL1
1 then LABEL2
2-10
described after "then."
: Turn off terminals Y (00) to Y (05).
: (1) When <condition> is met, branch to
step "LABEL1."
: (2) When <condition> is met, branch to
step "LABEL2."
: (3)
: (4) (2)
: (3)
:
: (3)
: (5) (4) (4)