927
Basic I/O Unit Instructions Section 3-23
Description IORF(097) refreshes the I/O words between St and E, inclusively. IORF(097)
is used to refresh words allocated to Basic I/O Units or Special I/O Units
mounted on the CPU Rack or Expansion Racks. IORF(097) cannot be used to
refresh words in both areas at the same time (i.e., with the same instruction).
Basic I/O Units are allocated words between CIO 0000 and CIO 0999, and
Special I/O Units are allocated words between CIO 2000 and CIO 2959.
When refreshing is specified for words in the Special I/O Unit bit area, all 10
words allocated to the Unit will be refreshed as long as the first word of the 10
words allocated to the Unit is included in the specified range of words.
If words for which there is no Unit mounted exist between St and E, nothing
will be done for those words and only the words allocated to Units will be
refreshed.
Both C200H Special I/O Units and CS Special I/O Units can be refreshed
using the same instruction. (CS Series only)
All of the words allocated to C200H Group-2 High-density I/O Units must be
refreshed at one time. The Unit’s I/O words will be refreshed if the first word
allocated to the Unit is in the specified range of I/O words. (The Unit’s words
will not be refreshed if the starting word is after the first word allocated to the
Unit, but they will be refreshed even if the end word is before the last word
allocated to the Unit.) (CS Series only)
IORF(097) can be used in interrupt tasks, allowing high-speed response for
the specific I/O words refreshed in the interrupt task. (See Precautions.)
Counter Area ---
DM Area ---
EM Area without bank ---
EM Area with bank ---
Indirect DM/EM addresses
in binary
---
Indirect DM/EM addresses
in BCD
---
Constants ---
Data Registers ---
Index Registers ---
Indirect addressing using
Index Registers
,IR0 to IR15
–2048 to +2047, IR0 to IR15
DR0 to DR15, IR0 to IR15,
IR0 to IR15+(++)
,–(– –) IR0 to IR15
Area St E
St
E
I/O refreshing
I/O bit area or
Special I/O Unit bit area
I/O Unit or
Special I/O Unit
To Next Page
Loading...
