Yokogawa Removable Chassis DX1000N - Manual (Page 230)

6-4
IM 04L41B01-17E
Command
Command type: R, R-M, W, W-M, E-M
Number of commands: Set up to 16 commands
Data type:
See the table below.
Symbol Description
INT16 16-bit signed integer
UINT16 16-bit unsigned integer
INT32_B 32-bit signed integer (higher and lower order)
INT32_L 32-bit signed integer (lower and higher order)
UINT32_B 32-bit unsigned integer (higher and lower order)
UINT32_L 32-bit unsigned integer (lower and higher order)
FLOAT_B 32-bit floating point (higher and lower order)
FLOAT_L 32-bit floating point (lower and higher order)
• Reading Values into the External Input Channels (DX2000 Only)
• External input channels are an option (/MC1).
• Reads values from the server register into the external input channels of the DX.
• The data type of external input channels is signed 16-bit integer.
• The measurement range and unit are set using the external input channels. The
decimal point position is determined by the Span_L settings.
Command
type
External input channel
Number: 201 to 440
Data type: 16-bit signed integer
R
30001 to 39999
300001 to 365536
40001 to 49999
400001 to 465536
INT 16, UINT 16,
INT 32_B, INT 32_L,
UINT 32_B, UINT 32_L
Register
Server DX2000
Data type
Read
External Input Channel Values
The range of external input channel values is –30000 to 30000 excluding the decimal.
If this range is exceeded, the value is set to +Over or -Over.
Value in the register on the server Value on the external input channel
More than 30000 + Over (7FFFH)
-30000 to 30000 -30000 to 30000
Less than -30000 - Over (8001H)
• Reading Values into Communication Input Data
• Reads values from the server register into the communication input data of the DX.
• Communication input data is an option (/M1, /PM1 option).
• The data type of the communication input data is 32-bit floating point.
• Communication input data can be displayed on a computation channel by including
the data in the equation of a DX computation channel (/M1, /PM1 option). The
measurement range and unit are also set using the computation channel.
R-M
30001 to 39999
300001 to 365536
40001 to 49999
400001 to 465536
INT 16, UINT 16,
INT 32_B, INT 32_L,
UINT 32_B, UINT 32_L,
FLOAT_B, FLOAT_L
Communication input data
Number: C01 to C24 (DX1000)
C01 to C60 (DX2000)
Data type: 32-bit floating point
Register
Server
Data type Command
type
DX1000, DX2000
Read
When the Data Type of the Read Source Server Is Not Floating Point
Type
Because the data type of the communication input data is 32-bit floating point, the
value never overflows. However, if the absolute value of the data is large for INT32_B,
INT32_L, UINT32_B, or UINT32_L, a rounding error may appear. This is because the
mantissa of the floating point type is 24 bits.
6.3 Modbus Protocol Specifications