Omron CJ - 08-2008 - Page 109

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Function Tables Section 1-8
Using Inter-
rupt Tasks
Monitoring operating sta-
tus at regular intervals.
• Monitoring operating sta-
tus at regular intervals.
Use a scheduled interrupt task. Programming
Manual
(W394)
4-3 Inter-
rupt Tasks
Issuing an interrupt to the
CPU when data is received
through serial communica-
tions.
Use a Serial Communications Units
and external interrupt task.
Performing interrupt pro-
cessing when an input
goes ON.
• Executing processing
immediately with an
input.
Use an I/O interrupt task.
Executing an emergency
interrupt program when the
power supply fails.
Use a power OFF interrupt task.
Enable the power OFF interrupt task
in the PLC Setup.
Studying the interrupt
response time
--- Operation
Manual
10-4-7 Inter-
rupt
Response
Times
Knowing the priority of
interrupt tasks
--- Programming
Manual
(W394)
4-3-2 Inter-
rupt Task
Priority
Data Pro-
cessing
Operating a FIFO or LIFO
stack.
Use the stack instructions (FIFO(633)
and LIFO(634)).
Instructions
Reference
Manual
(W340)
Table
Processing
Instructions
Performing basic opera-
tions on tables made up of
1-word records.
Use range instructions such as
MAX(182), MIN(183), and
SRCH(181).
Performing complex opera-
tions on tables made up of
1-word records.
Use Index Registers as pointers in
special instructions.
Performing operations on
tables made up of records
longer than 1 word.
(For example, the tempera-
ture, pressure, and other
manufacturing settings for
different models of a prod-
uct could be stored in sepa-
rate records.)
Use Index Registers and the record-
table instructions.
Programming
Manual
(W394)
6-2 Index
Registers
System
Configura-
tion and
Serial Com-
munications
Monitoring several differ-
ent kinds of devices
through the RS-232C port.
Multiple serial ports can be installed
with Serial Communications Units
(protocol macros).
Operation
Manual
2-5
Expanded
System
Configura-
tion
Changing protocol during
operation (from a modem
connection to host link, for
example).
Use STUP(237), the CHANGE
SERIAL PORT SETUP instruction.
Instructions
Reference
Manual
(W340)
Serial Com-
munica-
tions
Instructions
Purpose Function Manual Reference