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It is advisable to keep 16-bit parameters paired together. This prevents mis-alignment of
cyclic data with 32-bit PLC registers when using auto-mapping facilities to configure the
DeviceNet network. By swapping the mappings for input channel 2 with input channel 3
and moving output channel 5 to output channel 2, the data channel structure will appear
as shown in the following table.
Data
channel
IN channel 1
IN channel 2
IN channel 3
IN channel 4
IN channel 5
OUT channel 1
OUT channel 2
OUT channel 3 OUT word 2, 3
OUT channel 4 OUT word 4, 5
OUT channel 5 OUT word 6, 7
Input cyclic assembly object ID
S.01.018
Output cyclic assembly object ID
S.01.019
Pr S.01.018 and S.01.019 control the input and output DeviceNet objects and also the
number of polled words that are to be sent and received.
Table 6.4 on page 34 shows the number of the polled words corresponding to
Pr S.01.018 and Pr S.01.019.
SI-DeviceNet User Guide
Issue Number: 2
Data words
Mapping
used
for slot 3
IN word 0
Pr 3.02.001
IN word 1
Pr 3.02.002
IN word 2, 3
Pr 3.02.003
IN word 4
Pr 3.02.004
IN word 5
Pr 3.02.005
OUT word 0
Pr 3.03.001
OUT word 1
Pr 3.03.002
Pr 3.03.003
Pr 3.03.004
Pr 3.03.005
Default
112
Range
70-73, 106-160 (even)
Access
RW
Default
113
Range
20-23, 107-161 (odd)
Access
RW
Data
Setting
width
Mapping status
(bits)
0.10.040
16
Pr 10.040, status word
Pr 04.020, Motor load as % of
0.04.020
16
rated motor load
Pr 02.001, post-ramp speed
0.02.001
32
reference
0.14.021
16
Pr 14.021, PID1 feedback
0.14.001
16
Pr 14.001, PID1 output
0.06.042
16
Pr 06.042, control word
0.14.020
16
Pr 14.020, PID1 reference
0.01.021
32
Pr 01.021, preset reference 1
0.02.011
32
Pr 02.011, acceleration rate
0.02.021
32
1Pr 02.021, deceleration rate 1
33
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