matrikon opc server for allen-bradley 用户手册
Matrikon OPC Server for Allen Bradley
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<scaling>
Indicates which type of scaling is applied to the alias item.
The parameters that follow this value depend on the type
used. Possible scaling types are 0 (none), 1 (linear), 2
(square root), 3 (gain/offset), and 4 (expression).
The parameters that follow this value depend on the type
used. Possible scaling types are 0 (none), 1 (linear), 2
(square root), 3 (gain/offset), and 4 (expression).
<high raw>,
<low raw>,
<high scaled>,
<low scaled>,
<clamp>
<low raw>,
<high scaled>,
<low scaled>,
<clamp>
Linear or square-root scaling parameters include the raw
high and low values, scaled high and low values, and a
clamping option. Possible clamp types are 0 (none), 1
(clamp low value), 2 (clamp high value), and 3 (clamp both
high and low values).
high and low values, scaled high and low values, and a
clamping option. Possible clamp types are 0 (none), 1
(clamp low value), 2 (clamp high value), and 3 (clamp both
high and low values).
<gain>,
<offset>
<offset>
Gain/offset scaling parameters include a scaling factor and
an offset.
an offset.
"Input Expression","Output
Expression"
Expression"
Expression scaling parameters include input and output
expressions. The input expression is applied to the value
from the OPC item when reading. The output expression is
applied to values going to the OPC item when writing.
These equations should be reciprocals of each other.
expressions. The input expression is applied to the value
from the OPC item when reading. The output expression is
applied to values going to the OPC item when writing.
These equations should be reciprocals of each other.