Omron CS1D DUPLEX SYSTEM - 10-2009 Operation Manual page 572

Auxiliary Area Allocations
Address Name
Words Bits
A441 All Interrupt
Task With
Max. Pro-
cessing
Time (Sin-
gle CPU
Systems
only)
Read/Write Area
The following words and bits can be written by the user to control various aspect of PLC operation.
Addresses Name
Word Bit
A500 A50012 IOM Hold
Bit
A50013 Forced
Status
Hold Bit
A50014 Error Log
Reset Bit
A50015 Output
OFF Bit
A501 A50100 CPU Bus
to Unit
A50115 Restart
Bits
536
Function
Contains the task number of the
interrupt task with the maximum pro-
cessing time. Hexadecimal values
8000 to 80FF correspond to task
numbers 00 to FF. Bit 15 is turned
ON when an interrupt has occurred.
(This value is written after the inter-
rupt task with the max. processing
time is executed and cleared when
PLC operation begins.)
Function
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 Mem-
ory Area will be retained when the PLC
is turned ON or power is interrupted.)
Turn this bit ON to preserve the status
of bits that have been force-set or force-
reset when shifting between PRO-
GRAM and MONITOR or when the
power supply is turned ON.
Always use this bit in combination with
the IOM Hold Bit, i.e., A50012 must be
turned ON before A50013 is effective.
(If the status of the Forced Status Hold
Bit itself is preserved in the PLC Setup
(Forced Status Hold Bit Status), the sta-
tus of force-set and force-reset bits will
be retained when the PLC is turned ON
or power is interrupted.)
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.)
Turn this bit ON to turn OFF all outputs
from Basic I/O 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 interruptions.)
Turn these bits ON to restart (initialize)
the CPU Bus Unit with the correspond-
ing unit number. Bits 00 to 15 corre-
spond to unit numbers 0 to F.
When a restart bit is turned ON, the
corresponding CPU Bus Unit Initializing
Flag (A30200 to A30215) will be turned
ON. Both the restart bit and initializing
flag will be turned OFF automatically
when initialization is completed. Do not
turn the bit OFF from a Programming
Device or the ladder program.
Settings Status
after
mode
change
8000 to 80FF Cleared
hexadecimal
Settings Status
after
mode
change
ON: Held Held
OFF: Not
retained
ON: Held Held
OFF: Not
retained
OFF to ON: Held
Clear
--- Held
OFF to ON: Held
Restart
ON to OFF:
Restart com-
pleted
Turned OFF by
the system
when the Unit
has been
restarted.
Appendix B
Status at Timing Related
startup flags,
settings
Cleared See Func- ---
tion col-
umn.
Status at Timing Related
startup Flags,
Settings
See Read PLC
Function when Setup
column. power is
(IOM Hold
turned
Bit Status
ON
setting)
See Read PLC
Function when Setup
column. power is
(Forced
turned
Status
ON
Hold Bit
Status
setting)
Cleared --- A100 to
A199,
A300
Held --- ---
Cleared --- A30200 to
A30215