202
Sequence Control Instructions
Section 3-5
Operand Specifications
Description
The instructions between FOR(512) and NEXT(513) are executed N times
and then program execution continues with the instruction after NEXT(513).
The BREAK(514) instruction can be used to cancel the loop.
If N is set to 0, the instructions between FOR(512) and NEXT(513) are pro-
cessed as NOP(000) instructions.
Loops can be used to process tables of data with a minimum amount of pro-
gramming.
FOR-NEXT loops can be nested up to 15 levels. In the example below, pro-
gram sections A, B, and C are executed as follows:
A
→
B
→
B
→
C, A
→
B
→
B
→
C, and A
→
B
→
B
→
C
Area
N
CIO Area
CIO 0000 to CIO 6143
Work Area
W000 to W511
Holding Bit Area
H000 to H511
Auxiliary Bit Area
A000 to A959
Timer Area
T0000 to T4095
Counter Area
C0000 to C4095
DM Area
D00000 to D32767
EM Area without bank
E00000 to E32767
EM Area with bank
En_00000 to En_32767
(n = 0 to C)
Indirect DM/EM
addresses in binary
@ D00000 to @ D32767
@ E00000 to @ E32767
@ En_00000 to @ En_32767
(n = 0 to C)
Indirect DM/EM
addresses in BCD
*D00000 to *D32767
*E00000 to *E32767
*En_00000 to *En_32767
(n = 0 to C)
Constants
#0000 to #FFFF (binary) or &0 to &65,535
Data Registers
DR0 to DR15
Index Registers
---
Indirect addressing
using Index Registers
,IR0 to ,IR15
–2048 to +2047, IR0 to –2048 to +2047, IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –) IR0 to, –(– –) IR15
Repeated program section
Repeated N times
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 ...