Omron CS1W-MC221 -, Operation Manual

Page: 239 / 705

212
IOWR and IORD Specifications Section 4-2
Example 2 Changing Acceleration Time of X Axis to 500 ms
Settings
DM Area
Execution Timing for IOWR
Refer to the following diagrams for the execution timing and processing
method of the IOWR instruction.
1,2,3... 1. The CPU Unit performs a format check to see if the designations for the
IOWR instruction operands are correct. The Error Flag will be turned ON
and the IOWR instruction will not be executed if a designation is incorrect.
2. The MC Unit performs a data check to see if the MC Unit can process the
data designated with the operands. The Equals Flag will be turned ON if
the MC Unit can process the data. The Equals Flag will not be turned ON
and the IOWR instruction will not be executed if the MC Unit cannot pro-
cess the data. The transfer will be completed by the time the Equals Flag
turns ON.
Data writing bit 06 of word n + 10/n + 18, data write error bit 7 of word n +
10/n + 18, data reading bit 08 of word n + 10/n + 18, and data read error
bit 09 of word n + 10/n + 18 will not change when an IOWR instruction
DIFU(13) R1
Work bit
Set in the
expansion DM
area the
positioning data
described below.
Set the address of the X-axis acceleration
time (1136 Hex corresponds to 4406).
Set the address of first source word of the
acceleration time data.
Set the source unit number (0) and a total
of two words to be transmitted.
IOWR
#1136
D00100
#00020000
R3
R2
R3 R1
R2
=
Execution condition
OUT (Work bit)
Set the data
shown below in
the DM Area.
OUT (Work bit)
D0100
D0101 01F4
0000
500 ms.
Set
Transfer data
Format
check
Data check
and
processing
(1) (2)
Within one cycle
The completion time
varies with the data to be
transferred and the
number of words.
IOWR instruction