Specifications

184 Siemens Simatic S7 Driver Online Help
Parameters for 8AL Signal Conditioning
Description 8-bit binary number.
Input Range 0 – 255.
Scaling Scales 8-bit binary values to the
database block’s EGU range.
Read
Algorithm
Reads from a 16-bit register using
the same algorithm as 8BN, and
returns a status indicating whether
the value is out of range and in an
alarm state, or OK.
Result = ((Raw_value/255) *
Span_egu) + Lo_egu
Read
Algorithm
Variables
Lo_egu – the database block’s low
engineering value.
Span_egu – the span of the
engineering values.
Raw_value – the value stored in the
field device’s register.
Result – the scaled value stored in
the database block.