Table of Contents
Advertisement
Sequence Control Instructions
Precautions
212
Note In CS1-H, CJ1-H, CJ1M, and CS1D (for Single-CPU System) CPU Units, the
Equals and Negative Flags are left unchanged.
In CS1 and CJ1 CPU Units, the Equals and Negative Flags are turned OFF.
The cycle time is not shortened when a section of the program is interlocked
because the interlocked instructions are executed internally.
The operation of DIFU(013), DIFD(014), and differentiated instructions is not
dependent solely on the status of the execution condition when they are pro-
grammed between IL(002) and ILC(003). Changes in the execution condition
for DIFU(013), DIFD(014), or a differentiated instruction are not recorded if the
DIFU(013) or DIFD(014) is in an interlocked section and the execution condi-
tion for the IL(002) is OFF.
In general, IL(002) and ILC(003) are used in pairs, although it is possible to
use more than one IL(002) with a single ILC(003) as shown in the following
diagram. If IL(002) and ILC(003) are not paired, an error message will appear
when the program check is performed but the program will be executed prop-
erly.
Execution
condition
a
b
OFF
ON
OFF
OFF
ON
OFF
ON
ON
IL(002) and ILC(003) cannot be nested, as in the following diagram. (Use
MILH(517)/MILR(518) and MILC(519) when it is necessary to nest interlocks.)
Program section
A
B
Interlocked
Interlocked
Interlocked
Interlocked
Not interlocked
Interlocked
Not interlocked
Not interlocked
Section 3-5
Advertisement
Chapters
Table of Contents
