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Allen-Bradley Ethernet/IP and Modbus/TCP Protocol Support
When RTU32 PLCs are connected using the µLynx Ethernet Coprocessor (or then have an internal µLynx like the
M1650 or M655), they can be communicated with using Allen-Bradley SLC PCCC, CIP Data Table Messages,
Generic CIP Messages or Modbus /TCP protocol. The information below describes what protocol options are
supported and how the data is mapped to physical I/O or memory locations in the PLC:
Note: Both unconnected and connected Ethernet/IP explicit message styles are supported.
N9:0 r 4x0001 r 10001-10016 r (108, 1-16, 1) r Discrete Inputs DI1-DI16
N9:1 r 4x0002 r 10017-10032 r (108, 17-32 ,1) r Discrete Inputs DI17-DI32
N9:2 r 4x0003 r 10033-10048 r (108, 33-48, 1) r Discrete Inputs DI33-DI48
N9:3 r 4x0004 r 10049-10064 r (108, 49-64, 1) r Discrete Inputs DI49-DI64
N10:0 r 4x0011 r 00001-00016 r (111, 1-16, 1) r Discrete Outputs DO1-DO16
N10:1 r 4x0012 r 00017-00032 r (111, 17-32, 1) r Discrete Outputs DO17-DO32
N10:2 r 4x0013 r 00033-00048 r (111, 33-48, 1) r Discrete Outputs DO33-DO48
N10:3 r 4x0014 r 00049-00064 r (111, 49-64, 1) r Discrete Outputs DO49-DO64
N12:0 - N12:15 r 4x0021-4x0036 r 30001-30016 r (112, 1-16, 1) r AO1-AO16
N13:0 - N13:15 r 4x0085-4x0100 r 30065-30080 r (109, 1-16, 1) r AI1-AI16
N14:0 - N14:15 r 4x0149-4x0164 r 30129-30144 r (110, 1-16, 1) r PI1-PI16
N20:0 - N20:99 r/w 4x3000-4x3099 r/w (40, 0-99, 1) r/w User Memory Locations 0-99 (16 bit words)
N21:0 - N21:99 r/w 4x3100-4x3199 r/w (40, 100-199, 1) r/w User Memory Locations 100-199
N22:0 - N22:99 r/w 4x3200-4x3299 r/w (40, 200-299, 1) r/w User Memory Locations 200-299
STATION_xx Stations HH through WW (station data structure format - 100 words max)
GROUP_xxx Groups 001-255 (group data structure format - 50 words max)
PLC_STATUS (same format as control logix add-on instruction)
Mx User Memory - 1 word INT starting at word offset x
Ix User Memory - 1 word INT starting at word offset x
Fx User Memory - 2 word FLOAT starting at word offset x
Dx User Memory - 2 word DINT starting at word offset x
M1650 I/O and Memory Registers
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