A-113
Appendices
CJ2 CPU Unit Software User’s Manual
A-3 Auxiliary Area
App
A-3-1 Read-only Area (Set by System)
A200 A200.11 First Cycle Flag ON for one cycle after PLC operation begins (after the mode is
switched from PROGRAM to RUN or MONITOR, for example).
ON for the first cycle
--- --- ---
A200.12 Step Flag ON for one cycle when step execution is started with STEP(008).
This flag can be used for initialization processing at the beginning
of a step.
ON for the first cycle after execution of STEP(008).
Cleared --- ---
A200.14 Task Started
Flag
When a task switches from STANDBY or DISABLED to READY
status, this flag will be turned ON within the task for one cycle
only.
ON: ON for first cycle (including transitions from STANDBY and
DISABLED status)
OFF: Other
The only difference between this flag and A200.15 is that this flag
also turns ON when the task switches from STANDBY to READY
status.
Cleared Cleared ---
A200.15 First Task Star-
tup Flag
ON when a task is executed for the first time. This flag can be
used to check whether the current task is being executed for the
first time so that initialization processing can be performed if nec-
essary.
ON: First execution
OFF: Not executable for the first time or not being executed.
Cleared --- ---
A201 A201.10 Online Editing
Wait Flag
ON when an online editing process is waiting.
ON: Waiting for online editing
OFF: Not waiting for online editing
If another online editing command is received while waiting, the
other command will not be recorded and an error will occur.
Cleared Cleared A527
A201.11 Online Editing
Flag
ON when an online editing process is being executed.
ON: Online editing in progress
OFF: Online editing not in progress
Cleared Cleared A527
A202 A202.00
to
A202.07
Communications
Port Enabled
Flags
ON when a network instruction (SEND, RECV, CMND, PMCR,
TXDU, or RXDU) or background execution can be executed with
the corresponding port number. Bits 00 to 07 correspond to com-
munications ports 0 to 7.
ON: Network instruction is not being executed
OFF: Network instruction is being executed (port busy)
When two or more network instructions are programmed with the
same port number, use the corresponding flag as an execution
condition to prevent the instructions from being executed simulta-
neously.
(The flag for a given port is turned OFF while a network instruc-
tion with that port number is being executed.)
Cleared when an instruction is executed.
Cleared --- ---
A202.08 CJ2 Instructions
Enabled Flag
ON when CJ2 instructions can be used. This flag is ON by default.
This flag can be used only with the following instructions: SEND2,
CMND2, PMCR2, and RECV2.
--- Updated
accord-
ing to
internal
status
(cleared).
---
A202.15 Network Com-
munications Port
Allocation
Enabled Flag
ON when there is a communications port available for automatic
allocation when executing communications instructions (SEND,
RECV, CMND, PMCR, TXDU, or RXDU).
ON: Communications port available
OFF: Communications port not available
Use this flag to confirm whether a communications port is avail-
able for automatic allocation before executing communications
instructions when using 9 or more communications instructions
simultaneously.
Cleared --- ---
Address
Name Function
Status
after mode
change
Status at
startup
Write timing/
Related flags, set-
tings
Words Bits
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