135
Writing Data with IOWR
Section 5-4
5-4-5
Precautions when Using IOWR
IOWR 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 IOWR, 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 Hex). If the
transfer is started or ended part-way through, an IOWR format error (error
code 8701) will be generated.
When transferring the origin search high speed or the origin search proximity
speed, be sure to send both of these items together. If only one of these items
is transferred, an IOWR format error (error code 8701) will be generated.
Up to 128 words of consecutive data can be transferred with the IOWR
instruction. According to the PCU’s internal processing conditions, however,
there area two possible methods with which this data is written to the respec-
tive data area within the PCU. The method that is used will be determined
automatically; it does not have to be specified in the ladder program.
Summary of Contents for CJ1W-C113 - REV 02-2008
Page 2: ...CJ1W NC113 213 413 133 233 433 Position Control Units Operation Manual Revised February 2008 ...
Page 3: ...iv ...
Page 13: ...xiv ...
Page 15: ...xvi ...
Page 19: ...xx ...
Page 27: ...xxviii Conformance to EC Directives 6 ...
Page 43: ...16 Control System Principles Section 1 7 ...
Page 47: ...20 Basic Procedures Section 2 ...
Page 139: ...112 Examples of Parameter Settings Section 4 9 ...
Page 173: ...146 Transferring Data with CX Position Section 5 7 ...
Page 223: ...196 Sample Program Section 7 7 ...
Page 259: ...232 Sample Program Section 8 10 ...
Page 293: ...266 Easy Backup Function Ver 2 0 or later Section 9 11 ...
Page 369: ...342 Reading Error Information with CX Position Section 11 8 ...
Page 385: ...358 Common Parameter Area Appendix C ...