Chapter 4 PLC Features
4.2 Commands
4-22 ME0416-1A
e.g. • When M0 is set to S1 and 16 to S2 in DeviceNet, domains of input 16 words / output 16
words should be assigned to M0 to M511 (M0 to M255 for input and M256 to M512 for
output).
• When 1024 is set to S1 and 4 to S2 in CC-Link IE, domains of input 12 words / output 12
words should be assigned to M1024 to M1407 (M1024 to M1087 for input (RX), M1088 to
1215 for input (Rwr), M1216 to M1279 for output (RY) and M1280 to M1407 for output
(Rww)).
As described above, Fieldbus Communication Command 2 covers the range of the fieldbus
communication command and the equivalent function is available without using the fieldbus
communication command, but it should be kept for compatibility at project model conversion.
Shown below is precaution when using Fieldbus Communication Command 2.
Caution in Use of Fieldbus Communication Command 2
No. Caution Reason
1 Reboot of GW required when changing S2
Input and output domains cannot be
updated properly when S2 data size made
larger than the size described previously.
(Size setting process is conducted in the
2
Necessary to see a value of multiple of 16
such as AM0 and M384 in S1
OM range check is conducted in unit of
words
3
Necessary to conduct memory assignment
without duplication as duplication check is
not conducted for domains occupied in S1
Proper value cannot be acquired when the
used domain is duplicated with e.g. axis
control command as multiple commands
4
Two or more descriptions cannot be made
for Fieldbus Communication Command 2
There is a possibility of data size different
from expected
5
Descriptions cannot be made both for
Fieldbus Communication Command and
Fieldbus Communication Command 2
There is a possibility of data size different
from expected
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