Omron SYSMAC CS Series Operation Manual page 458

CIO Area
IORF(097) Refreshing
Limitations on Output Bits
420
When IORF(097) (I/O REFRESH) is executed, the ON/OFF status of output
bits in the specified range of words is output to their external devices. This I/O
refreshing is performed in addition to the normal I/O refreshing performed
once each cycle.
Note IORF(097) refreshes output bits allocated to Basic I/O Units (excluding Basic
I/O Units mounted in Remote I/O Slave Racks), C200H Group-2 High-density
I/O Units, and other High-density I/O Units which are Special I/O Units.
The following IORF(097) instruction refreshes the status of all I/O points in I/O
Area words CIO 0000 to CIO 0003. The status of input points is read from the
Input Units and the status of output bits is written to the Output Units.
In this example, the status of input points allocated to CIO 0002 and CIO 0003
are output to the Output Unit. (CIO 0000 and CIO 0001 are allocated to Input
Units.)
CPU Unit
Bit allocation
Output bits can be programmed in any order. Output bits can be used as oper-
ands in Input instructions and there is no limit on the number of times that an
output bit is used as a normally open and normally closed condition.
An output bit can be used in only one Output instruction that controls its sta-
tus. If an output bit is used in two or more Output instructions, only the last
instruction will be effective.
Note All outputs on Basic I/O Units and Special I/O Units can be turned OFF by
turning ON the Output OFF Bit (A50015). The status of the output bits won't
be affected even though the actual outputs are turned OFF.
CIO 0002
Output Unit
CIO 0003
Output when
IORF (097)
is executed.
CIO 000000 is controlled
by CIO 000010.
Only this instruction is
effective.
Section 9-4
Actuator