A-1-20 Step Instructions; A-1-21 Basic I/O Unit Instructions - Omron CJ2 - 02-2010 User Manual

Appendices
Instruction Mnemonic Code
ENABLE EI 694
INTER-
RUPTS
A-1-20 Step Instructions
Instruction Mnemonic Code
STEP STEP 008
DEFINE
STEP START SNXT 009
A-1-21 Basic I/O Unit Instructions
Instruction Mnemonic Code
I/O IORF 097
REFRESH
@IORF
SPECIAL I/O FIORF 225
UNIT I/O
@FIORF
REFRESH
CPU BUS DLNK 226
UNIT I/O
@DLNK
REFRESH
A-56
Symbol/Operand
Enables execution of all interrupt tasks that were disabled
EI(694)
with DI(693).
0000.00
Symbol/Operand
STEP(008) functions in following 2 ways, depending on its position
STEP(008)
and whether or not a control bit has been specified.
B
(1) Starts a specific step.
(2) Ends the step programming area (i.e., step execution).
B: Bit
The step program area is from the first STEP(008) instruction
(which always takes a control bit) to the last STEP(008) instruction
(which never takes a control bit).
SNXT(009) is used in the following three ways:
SNXT(009)
(1) To start step programming execution.
B
(2) To proceed to the next step control bit.
B: Bit
(3) To end step programming execution.
Symbol/Operand
Refreshes the specified I/O words.
IORF(097)
St
I/O bit area or
Special I/O Unit bit area
E
St
St: Starting word
E: End word
E
Immediately refreshes the I/O words allocated to the Special I/O
FIORF(225)
Unit with the specified unit number.
N
N: Unit number
Immediately refreshes the I/O words allocated to the CPU Bus
DLNK(226)
Unit with the specified unit number.
N
N: Unit number
Function
When CIO 0000.00 turns ON
in this example, EI(694)
enables all interrupt tasks that
were disabled with DI(693).
Disables execution of all
interrupt tasks (except
the power OFF interrupt).
Enables execution of all
disabled interrupt tasks.
Function
Function
I/O Unit or
Special I/O Unit
I/O refreshing
CJ2 CPU Unit Software User's Manual
Execution
Location
condition
Output Not
required
Execution
Location
condition
Output Required
Output Required
Execution
Location
condition
Output Required
Output Required
Output Required