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dataFEED Gateway - User Manual
<StartAddress>
The start address defines the point at which reading and writing starts.
Example:
ER120: Input Register 120
If the start address is a specific bit, the bit number is also required.
<.BitNumber>
The bit number must be provided whenever the data type is BOOL.
Example:
HRX5.2: bit 2 of Holding Register 5
[.ArraySize]
Arrays merge several units of one data type.
Example:
HRD50.3
[Strings]
For a Modbus controller to support strings we interpret consecutive Modbus registers as a character string with 8
bit US-ASCII coding.
Example:
RS100.8 allows an interpretation of Modbus registers 100 to 108 as a string of 8 character of 8 bits each.
[Suffix]
By using a suffix a value can be presented in another format.
Suffix
Syntax
Use
Area
Data type
Comments
BitArray
BA
Byte
Word
Int
DWord
Dint
No. of bits:
Size in bytes times 8
Size in words times 16
Size in Int times 16
Size in DWord times 32
Size in Dint times 32
BOOLEAN
BOOLEAN
BOOLEAN
BOOLEAN
BOOLEAN
With the
BA
suffix,
the data saved in the PLC
is shown as an array of
bits.
BCD
BCD
Byte
Word
Int
DWord
Dint
Byte:
Word:
Int:
DWord:
Dint:
0 to 99
0 to 9999
0 to 9999
0 to 9999999
0 to 9999999
SHORT
SHORT
With the
BCD
suffix,
the data saved in the PLC
is shown as non-signed,
binary-coded values.
For example, the decimal
value
65535
is shown as
9999
.
