IAI America RCM-GW-DV - Manual (Page 65)

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DeviceNet Gateway
6.3.1 Overall address configuration
Each Gateway control signal input or output consists of two words. Only in this mode, PPS0 to PPS2
and NPS0 to NPS4 of control word 0 are used to set the pattern and number of position-number
specification axes. This is followed by the command I/O areas each consisting of seven words, and
the Gateway control signal and command I/O areas each consisting of nine words. These areas are
fixed.
Although the control areas for each axis are assigned immediately after the fixed areas, positioner
operation axes should always be assigned first, followed by simple direct operation axes.
When assigning areas for each axis, make sure no empty bytes remain in between assigned bytes.
The total I/O area size of the Gateway varies according to how the mode setting switch SW1 is set,
as shown in the table below.
SW1 Mode
number 4 3 2 1
- Total I/O areas Fixed areas
Control areas for
each axis
7 X X X { Large mode
160 bytes = 80
words each
71 words each
8 X { X {
Middle
mode
128 bytes = 64
words each
55 words each
9 { X X { Small mode
64 bytes = 32
words each
9 words
each
23 words each
Up to 16 axes can be assigned, including positioner operation axes and simple direct operation axes,
within the areas specified in the table above.
With positioner operation axes, each axis control signal consists of one word for both input and
output. With simple direct operation axes, three PLC input signal words and four PLC output signal
words are available.
The following page provides an example, where three positioner operation axes and five simple direct
operation axes are assigned in the Small mode.