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5-4 Special Remote I/O Operation
There are three kinds of CompoBus/D remote I/O operation: Basic remote I/O, standard remote I/O (the
default setting), and special remote I/O. This section explains special remote I/O.
Special remote I/O operation enables using all the functions of 3G3FV-series Inverters, and setting and
reading all parameters. These operations have been developed independently, and are not part of the
DeviceNet standard.
5-4-1 Overview of Special Remote I/O
Special remote I/O operations utilize CompoBus/D (DeviceNet) remote I/O, and can directly write to
and read from internal Inverter registers. Basically, the register numbers for the various functions shown
on this and subsequent pages are specified for writing or reading. Once data has been written, it is re-
tained until it is changed by the next write operation.
H Words Used for Special Remote I/O
D Outputs (SYSMAC PC to 3G3FV) Instance ID: 100 Dec (64 Hex)
Byte number Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Wd n
Rightmost 0 Function code (write/read code)
Leftmost 1 Register number leftmost byte (register number allocated to each parameter, etc.)
Wd n+1
Rightmost 2 Register number rightmost byte (register number allocated to each parameter, etc.)
Leftmost 3 Register data leftmost byte (data to write to specified register)
Wd n+2 Rightmost 4 Register data rightmost byte (data to write to specified register)
D Outputs (3G3FV to SYSMAC PC) Instance ID: 150 Dec (96 Hex)
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Wd m
Rightmost 0 Function code (returns transmitted code)
Leftmost 1 Register number leftmost byte (returns transmitted register number)
Wd m+1
Rightmost 2 Register number rightmost byte (returns transmitted register number)
Leftmost 3 Register data leftmost byte (returns transmitted data amount or reads data)
Wd m+2 Rightmost 4 Register data rightmost byte (returns transmitted data amount or reads data)
Note 1. Special remote I/O outputs and inputs are paired. When using special remote I/O, be sure to
set them together.
Note 2. Special remote I/O objects do not conform to the AC/DC drive profile, but are specially set for
this product.
Note 3. The 16-bit data (register number and register data) is set in two words for each setting.
H Function Codes
The special remote I/O function codes are shown in the following table. Note that they are different from
the explicit message service codes.
Function code (hex) Content
10 Data writing
03 Data reading
00 No execution (data wrapping only; no internal
processing takes place.)
CompoBus/D Communications Card Operations Chapter 5