Download SYSMAC CJ Series CJ2 CPU Unit Software USER`S MANUAL

Appendices
A-3-2
Read/Write Area (Set by User)
Address
Name
Words
A500
Function
Settings
Bits
A500.12
Forced Status Hold Bit
Turn this bit ON to preserve the status of the I/O Memory when shifting from PROGRAM to RUN or MONITOR mode or vice versa. (If the status of the IOM Hold
Bit itself is preserved in the PLC Setup (IOM Hold Bit
Status), the status of the I/O Memory Area will be
retained when the PLC is turned ON or power is interrupted.)
ON: Retained
Turn this bit ON to preserve the status of bits that have
been force-set or force-reset when shifting from PROGRAM to MONITOR mode or vice versa, or when turning ON the power. Be sure to always use this bit
together with the IOM Hold Bit (A500.12). Turn ON the
IOM Hold Bit (A500.12) at the same time as this bit.
Status will also be held with the power supply is interrupted.
ON: Retained
Retained
OFF: Not retained
Retained
OFF: Not retained
Status at
startup
Write timing/
Related flags,
settings
Cleared
(PLC
Setup can
be set to
retain status.)
See Function
column.
Cleared
(PLC
Setup can
be set to
retain status.)
See Function
column.
PLC Setup
(IOM Hold Bit
Status setting)
PLC Setup
(Forced Status
Hold Bit Status setting)
Setting parameter in the PLC Setup must be turned set.
A500.14
Retained
Cleared
A100 to A199,
A300
---
Retained
Retained
---
Turn these bits ON to restart (initialize) the CPU Bus
Unit with the corresponding unit number. Bits 00 to 15
correspond to unit numbers 0 to F.
OFF to ON: Restart
Retained
Cleared
A302.00 to
A302.15
When a restart bit is turned ON, the corresponding
CPU Bus Unit Initializing Flag (A302.00 to A302.15) will
be turned ON. Both the restart bit and initializing flag
will be turned OFF automatically when initialization is
completed.
Turned OFF by the
system when the
Unit has been
restarted.
Turn these bits ON to restart (initialize) the Special I/O
Unit with the corresponding unit number. Bits A502.00
to A507.15 correspond to unit numbers 0 to 95.
OFF to ON: Restart
Retained
Cleared
A330.00 to
A335.15
When a restart bit is turned ON, the corresponding
Special I/O Unit Initializing Flag (A330.00 to A335.15)
will be turned ON. Both the restart bit and initializing
flag will be turned OFF automatically when initialization
is completed.
Turned OFF by the
system when the
Unit has been
restarted.
Differentiate Monitor
Completed
Flag
ON when the differentiate monitor condition has been
established during execution of differentiation monitoring.
ON: Monitor condition established
Retained
Cleared
---
Trace Trigger Monitor
Flag
ON when a trigger condition is established by the Trace
Start Bit (A508.14). OFF when the next Data Trace is
started by the Sampling Start bit (A508.15).
ON: Trigger condition established
Retained
Cleared
---
Trace Completed Flag
ON when sampling of a region of trace memory has
been completed during execution of a Trace.
ON: Trace completed
Retained
Cleared
---
OFF when the next time the Sampling Start Bit
(A508.15) is turned from OFF to ON.
OFF: Not tracing or
trace in progress
Turn this bit ON to reset the Error Log Pointer (A300) to
00.
The contents of the Error Log Area itself (A100 to A199)
are not cleared. This bit is automatically reset to 0 after
the Error Log Pointer is reset.
A500.15
Output OFF
Bit
Turn this bit ON to turn OFF all outputs from Basic I/O
Units, regardless of the status of the output bits in I/O
memory (the same as when a fatal error occurs). The
INH indicator on the front of the CPU Unit will light.
Note: The status of this bit is held when the power
supply is turned OFF.
The status of outputs bits allocated to Special I/O Units
in the CIO Area (e.g., external analog outputs) depends
on the functions of the individual Special I/O Units.
A501
A502 to
A507
A508
A501.00
to
A501.15
A502.00
to
A507.15
A508.09
A508.11
A508.12
CPU Bus
Unit Restart
Bits
Special I/O
Unit Restart
Bits
This flag will be cleared to 0 when differentiation monitoring starts.
CJ2 CPU Unit Software User’s Manual
ON to OFF: Restart
completed
ON to OFF: Restart
completed
OFF: Not yet established
OFF: Not yet established or not tracing
A-151
A-3-2 Read/Write Area (Set by User)
OFF → ON: Clear
Error Log
Reset Bit
App
To preserve the status of this bit when the PLC is
turned ON, the Forced Status Hold Bit Startup Hold
A-3 Auxiliary Area
A500.13
IOM Hold
Bit
Status
after
mode
change