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Reading Data with IORD
Section 5-5
5-5-6
Precautions when Using IORD
IORD is an instruction which transfers all specified data with a single execu-
tion. Therefore, it increases the cycle time for the ladder program by the time
required to transfer the data.
Refer to
Appendix A Performance Characteristics
for details on the times
required for transferring positioning sequences. Use them as reference values
for setting cycle time monitoring time.
When using IORD, be sure to transfer data in complete units, and do not start
or end transfer in the middle of data. For example, with X axis sequence #0,
the data unit consists of three words (addresses: 1000 to 1002). If the transfer
is started or ended part-way through, an IORD format error (error code 8700)
will be generated.
Using IORD, a maximum of 128 words of data in consecutive addresses can
be transferred at one time.
5-5-7
IORD Program Example
In this example, speeds #0 and #1 written in
5-4 Writing Data with IOWR
are
read. The conditions to be set are the same as those used in the example of
writing the data. The beginning word for the DM Area where the read data is
to be stored is set at D00500.
Note
Depending on the timing of IORD instructions, transfer errors may not be
reflected in the CPU Unit. (For details, refer to
5-1 Transferring and Saving
Data.
)
CPU Unit
Unit number
Data transfer
PCU (NC413: unit number 2)
Data area
Speed #0
Speed #1
Содержание CJ1W-C113 - REV 02-2008
Страница 1: ...Position Control Units Cat No W397 E1 07 SYSMAC CJ1W NC113 213 413 133 233 433 OPERATION MANUAL ...
Страница 2: ...CJ1W NC113 213 413 133 233 433 Position Control Units Operation Manual Revised February 2008 ...
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Страница 13: ...xiv ...
Страница 15: ...xvi ...
Страница 19: ...xx ...
Страница 27: ...xxviii Conformance to EC Directives 6 ...
Страница 43: ...16 Control System Principles Section 1 7 ...
Страница 47: ...20 Basic Procedures Section 2 ...
Страница 139: ...112 Examples of Parameter Settings Section 4 9 ...
Страница 173: ...146 Transferring Data with CX Position Section 5 7 ...
Страница 223: ...196 Sample Program Section 7 7 ...
Страница 259: ...232 Sample Program Section 8 10 ...
Страница 293: ...266 Easy Backup Function Ver 2 0 or later Section 9 11 ...
Страница 369: ...342 Reading Error Information with CX Position Section 11 8 ...
Страница 385: ...358 Common Parameter Area Appendix C ...
Страница 399: ...372 Parameter Coding Sheets Appendix E ...