Program Control; Conditional Branch Control: If - Else - Iend - Mitsubishi Electric R16MTCPU Programming Manual

4.14

Program Control

Conditional branch control: IF - ELSE - IEND

Format
IF(S) - ELSE - IEND
Setting data
■Usable Data
: Usable
Setting Usable Data
data
Bit
device

(S)
■Description, data type of result
Setting data Description
(S) Conditional data which controls the flow of program
Processing details
• If the data specified with (S) is true, the block between IF and ELSE is executed.
• If the data specified with (S) is false, the block between ELSE and IEND is executed.
• ELSE can be omitted. In that case, the block between IF and IEND is executed only when the data specified with (S) is true.
• Maximum multiplicities of conditional branch control are eight including selective branch control. (SELECT - CASE - SEND)
IF...
IF...
SELECT...
CASE...
CEND
SEND
IEND
IEND
Operation error
In the following case, an operation error will occur, and the corresponding Motion SFC program No. execution will be stopped.
For the subroutine called program, the call source program also stops to execute.
• (S) is indirectly specified device, and the device No. is outside the range.
4 OPERATION CONTROL PROGRAMS
194
4.14 Program Control
Number of basic steps
IF: 8
ELSE: 5
IEND: 1
Word device
16-bit 32-bit 64-bit
integer integer floating
type type (L) point
type (F)
  
(3 level) (2 level) (1 level)
Usable steps
F/FS

Constant
16-bit 32-bit 64-bit
integer integer floating
type type point
(K/H) (K/H, L) type (K)
  
G

Calculation Bit
expression conditional
expression
 
Data type of result

Comparison
conditional
expression
