YOKOGAWA DXAdvancedR4 DX1000, Руководство пользователя

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IM 04L41B01-19E
I/O Buffer and Data Mapping
A master device such as a PLC accesses internal data of the DX via the "Input buffer"
and "Output buffer" of the DX. "Input" represents an input to the master, while "Output"
represents an output from the master.
Mapping Method of the I/O buffer
The " Input buffer" and "Output buffer" of the DX for PROFIBUS-DP communication has
128 bytes each. Data is laid out as described in the following table. Data layout cannot
be changed.
Buffer Application Description
Input Reading
measurement channel
data and computation
channel data
Locates all the measurement channel data from the top of
the buffer. Locates as much computation channel data as
possible in the remaining part of the buffer.
Buffer Application Description
Output Writing
communication input
data
Locates as much communication input data as possible.
Data Count and Data Type
The DX data count is as follows:
Model Measurement channel Computation channel Communication input
data
Count Number Count Number Count Number
DX1002 2 001, 002 12 101 to 112 24 C01 to C24
DX1004 4 001 to 004
DX1006 6 001 to 006 24 101 to 124
DX1012 12 001 to 012
DX2004 4 001 to 004 12 101 to 112 60 C01 to C32
(C33 to C60)
*1 DX2008 8 001 to 008
DX2010 10 001 to 010 60 101 to 127
(128 to 160) *1
DX2020 20 001 to 020 101 to 122
(123 to 160)
*1
DX2030 30 001 to 030 101 to 117
(118 to 160)
*1
DX2040 40 001 to 040 101 to 112
(113 to 160) *1
DX2048 48 001 to 048 101 to 108
(109 to 160)
*1
*1 Data in parentheses cannot be located in a buffer because it exceeds the capacity of the I/O
buffer.
Note
The communication input data for C01 to C24 (on the DX1000) or for C01 to C32 (on the
DX2000) is reserved for PROFIBUS-DP.
You cannot write to these data numbers through other means (such as Modbus, PLC
communication protocol, or communication commands).