Setting column
Alternatives
Description
Scaling
No scaling
1)
No rescaling of the Modbus UDR
value. Scaling arguments are
ignored.
Ratio scaling
Linear scaling of the source
value between the source range
“Min In”...”Max In” into UDR
value range “Min Out”...”Max
Out”. The scaled UDR value
saturates at “Min Out” and “Max
Out” values.
Multiplicative scaling
The source value is multiplied
with scaling argument 1 (similar
to argument in Ratio “Min In”).
Other scaling arguments are
ignored.
Divisor scaling
The source value is divided by
the scaling argument 1 (similar to
argument in Ratio “Min In”).
Other scaling arguments are
ignored.
Min In
Any real value
Scaling argument 1. Used also
as the scaling factor for
Multiplicative and Divisor
scaling.
Max In
Any real value
Scaling argument 2.
Min Out
Any real value
Scaling argument 3.
Max Out
Any real value
Scaling argument 4.
Presentation: 32-bit register presentation
Word swap
Unchecked
1)
32-bit register value expressed
according to “de facto” standard.
Word order High-Low.
Checked
32-bit register value word order
changed to Low-High.
Presentation: Special retrofit value manipulation
Byte swap
Unchecked
1)
16-bit register value expressed
according to Modbus standard.
Byte order High-Low.
Checked
16-bit register value byte order
changed to Low-High.
Table continues on next page
1MRS757645 B
Section 3
Vendor-specific implementation
620 series
47
Communication Protocol Manual
