I/O Buffer And Data Mapping; Mapping Method Of The I/O Buffer; Data Count And Data Type - YOKOGAWA DXAdvancedR4 DX1000 User Manual

I/O Buffer and Data Mapping

Mapping Method of the I/O buffer

Data Count and Data Type

IM 04L41B01-19E
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.
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
Input Reading
measurement channel
data and computation
channel data
Buffer Application
Output Writing
communication input
data
The DX data count is as follows:
Model Measurement channel
Count
DX1002 2
DX1004 4
DX1006 6
DX1012 12
DX2004 4
DX2008 8
DX2010 10
DX2020 20
DX2030 30
DX2040 40
DX2048 48
*1 D ata 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).
Description
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.
Description
Locates as much communication input data as possible.
Computation channel
Number Count
001, 002 12
001 to 004
001 to 006 24
001 to 012
001 to 004 12
001 to 008
001 to 010 60
001 to 020
001 to 030
001 to 040
001 to 048
Communication input
data
Number Count
101 to 112 24
101 to 124
101 to 112 60
101 to 127
*1
(128 to 160)
101 to 122
*1
(123 to 160)
101 to 117
(118 to 160) *1
101 to 112
*1
(113 to 160)
101 to 108
*1
(109 to 160)
Number
C01 to C24
C01 to C32
*1
(C33 to C60)
11