Siemens SIMATIC 505 - Page 42

Software Interface
2-19
If changes to the default selection are required, the bit assignments are
described below:
Bits 1–3
Description
116
[xxx. .... .... ....] (Reserved
for future use)
Bits 4–7
V elocity Filter Constants Description
116
[...0 000. .... ....] Filter constant = 0.0
[...0 001. .... ....] Filter constant = 0.1
[...0 010. .... ....] Filter constant = 0.2
[...0 011. .... ....] Filter constant = 0.3
↓↓
[...1 111. .... ....] Filter
constant = 1.5
Bit 8
Bias Option Bit
116
[.... ...0 .... ....] Pressure setpoint is not forced into
the bias term. The bias term is
initialized to 16000
[.... ...1 .... ....] Pressure setpoint is forced into the bias
term whenever there is a change in
setpoint. A setpoint goes through a scale
conversion prior to copy to the bias term.
The formula for conversion is:
   
NOTE: Bit 8 is used only in Ram closed-loop, pressure PID, standard
algorithm, and machine configuration 3.
Constant 14
(continued)