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84
CPU Unit Operation
Section 2-4
Immediate Refreshing
When the immediate refreshing variation of an instruction is specified and the
instruction’s operand is an input bit or word in the Built-in I/O Area, the word
containing the bit or the word itself will be refreshed.
Note
(1) Immediate refreshing is possible only for the Built-in I/O Area. Use
IORF(097) for I/O on CPM1A Expansion Units and Expansion I/O Units.
(2) Refreshing Range
• Bit Operands
The ON/OFF status of the 16 I/O points allocated to the word contain-
ing the specified bit will be refreshed.
• Word Operands
The ON/OFF status of the 16 I/O points allocated to the specified word
will be refreshed.
(3) Refresh Timing
• Input or source operands are read just before the instruction is execut-
ed.
• Output or destination (results) operands are written just after the in-
struction is executed.
(4) Using instructions with the immediate refresh option, instruction execu-
tion time will be increased, increasing the overall cycle time. Be sure to
confirm that this will not adversely affect system operation.
IORF(097) Refreshing
When IORF(097) (I/O REFRESH) is executed, the I/O bits in the specified
range of words are refreshed. IORF(097) can be used for CPM1A Expansion
Units, CPM1A Expansion I/O Units, and CJ-series Special I/O Units.
If high-speed response is required from input to output, execute IORF(097)
before and after the relevant instructions.
Note
IORF(097) has a relatively long execution time which increases with the num-
ber of words being refreshed. Be sure to consider the affect of this time on the
overall cycle time. Refer to the CP Series CP1H Programmable Controllers
Programming Manual for instruction execution times.
15
0
!LD
0.00
0
15
!OUT
100.00
0
15
!MOV
1
101
11
7
11
7
Immediate refresh
CIO 0
CIO 101
CIO 1
CIO 100
IORF
St
E
IORF
2
5
Example
St: Starting word
E: End word
All the words from St to E, inclusive
are refreshed.
Here, the four words from CIO 2
to CIO 5 are refreshed.
Содержание CP1H-CPU - 05-2006
Страница 1: ...OPERATION MANUAL CP1H CPU Unit SYSMAC CP Series CP1H X40D CP1H XA40D CP1H Y20DT D Cat No W450 E1 02...
Страница 2: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised May 2006...
Страница 3: ...iv...
Страница 11: ...xii TABLE OF CONTENTS...
Страница 15: ...xvi...
Страница 19: ...xx...
Страница 31: ...xxxii Conformance to EC Directives 6...
Страница 71: ...40 Function Blocks Section 1 5...
Страница 133: ...102 Computing the Cycle Time Section 2 7...
Страница 169: ...138 CPM1A Expansion I O Unit Wiring Section 3 6...
Страница 411: ...380 Clock Section 6 8...
Страница 519: ...488 Replacing User serviceable Parts Section 10 2...
Страница 527: ...496 Standard Models Appendix A...
Страница 535: ...504 Dimensions Diagrams Appendix B...
Страница 628: ...597 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 629: ...598 Connections to Serial Communications Option Boards Appendix F...
Страница 659: ...628 PLC Setup Appendix G...
Страница 665: ...634 Index work words 159 write protection 370...
Страница 667: ...636 Revision History...