Omron CP1H CPU

668
Auxiliary Area Allocations by Address Appendix D
Read/Write Area (Set by User)
Addresses Name Function Settings Status
after
mode
change
Status at
startup
Write
timing
Related
Flags,
Settings
Word Bits
A500 A500.12 IOM Hold Bit Turn this bit ON to preserve the sta-
tus of the I/O Memory when shifting
from PROGRAM to RUN or MONI-
TOR mode or vice versa. The I/O
Memory includes the CIO Area,
Transition Flags, Timer Flags and
PVs, Index Registers, and Data Reg-
isters.
(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
OFF: Not
retained
Retained See
Function
column.
See
Function
column.
PLC
Setup
(IOM Hold
Bit Status
setting)
A500.13 Forced Sta-
tus Hold Bit
Turn this bit ON to preserve the sta-
tus of bits that have been force-set or
force-reset when shifting from PRO-
GRAM to MONITOR mode or vice
versa. Bits that have been force-set
or force-reset will always return to
their default status when shifting to
RUN mode.
(If the status of the Forced Status
Hold Bit itself is preserved in the PLC
Setup (Forced Status Hold Bit Sta-
tus), the status of force-set and
force-reset bits will be retained when
the PLC is turned ON or power is
interrupted.)
ON: Retained
OFF: Not
retained
Retained See
Function
column.
See
Function
column.
PLC
Setup
(Forced
Status
Hold Bit
Status
setting)
A500.14 Error Log
Reset Bit
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.)
OFF to ON:
Clear
Retained Cleared --- A100 to
A199,
A300
A500.15 Output OFF
Bit
Turn this bit ON to turn OFF all out-
puts from the CPU Unit, CP-series
Units, and Special I/O Units. The INH
indicator on the front of the CPU Unit
will light while this bit is ON.
(The status of the Output OFF Bit is
retained through power interrup-
tions.)
--- Retained Retained --- ---
A501 A501.00
to
A501.15
CPU Bus
Unit Restart
Bits
Turn the corresponding bit ON to
restart (initialize) the CPU Bus Unit
with the corresponding unit number.
Bits 00 to 15 correspond to unit num-
bers 0 to F.
When a restart bit is turned ON, the
corresponding CPU Bus Unit Initializ-
ing 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.
OFF to ON:
Restart
ON to OFF:
Restart com-
pleted
Turned OFF by
the system
when the Unit
has been
restarted.
Retained Cleared --- A302.00
to
A302.15
A502 to
A507
A502.00
to
A507.15
Special I/O
Unit Restart
Bits
Turn the corresponding bit 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.
When a restart bit is turned ON, the
corresponding Special I/O Unit Ini-
tializing Flag (A330.00 to A335.15)
will be turned ON. Both the restart bit
and initializing flag will be turned
OFF automatically when initializa-
tion is completed.
OFF to ON:
Restart
ON to OFF:
Restart com-
pleted
Turned OFF by
the system
when the Unit
has been
restarted.
Retained Cleared --- A330.00
to
A335.15