6. DeviceNet COMMUNICATION
IMR01Y09-E3
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Number of communication words setting by DIP switch
Use the switch Nos. 4 and 5 of the DIP switch which there is on the left side of COM-JH, sets the
number of communication words when conducting polling I/O communication.
Left side view
DIP switch
ON
OFF
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
4 5
Number of communication words when conducting
DeviceNet polling I/O communication
OFF OFF
7
words
ON OFF
25
words
OFF ON
45
words
ON ON
100
words
Factory set value: 7 words
Switch No. 3, 6, 7 and 8: OFF fixed. (Don’t change this one)
The number of communication words can be calculated from the following equation.
Number of communication words
=
Number of communication items
×
Number of communication controllers
+
Fixed communication date items: 5 words*
* Measured data items (IN)
Receive counter:
1 word
Alarm state:
2 words
RUN/STOP state:
2 words
Setting data items (OUT)
Setting state selection: 3 words
RUN/STOP transfer: 2 words
The number of communication words when conducting polling I/O communication can also
be set via Explicit message communication, or by the configuration tool or rotary switch.
However, when the number of communication words is set via Explicit message
communication, or by the configuration tool or rotary switch, the value set by the DIP switch
may be ignored.
For switch Nos. 1 and 2, see
5.3 DIP Switch Setting (P. 22)
.
