Siemens Milltronics BW500, Operating Instructions Manual

Page: 175 / 220

Parameters
12.7 Proportional Integral Derivative (PID) Control
BW500 and BW500/L
Operating Instructions, 12/2016, A5E33482052-AD
173
12.6.6 P399 Incline Sensing
Factors out the varying vertical force components applied to the belt scale for all multispans
selected (f = 0.00). The value is presented in degree angle (0.0° = horizontal), with a range from
-30 to 30 °.
P399 can also be used for a constant angle if a mA input is not configured. Otherwise, P399 will
contain the current value corresponding to the mA input.
1)
1)
BW500/L does not have mA inputs, only a fixed incline compensation value can be entered.
12.7 Proportional Integral Derivative (PID) Control
Note
• Changes to P401, P402, and P414 are not immediately effected while in auto mode.
Change should be made in the manual mode and are effected upon return to the auto
mode.
•
The PID function does not control during any of the calibration functions (e.g. zero, span,
factor, material test).
• Not available with BW500/L.
12.7.1 P400 PID System
Enables the selected PID system, systems 1 or 2 (P400 – 01 or – 02).
Entry:
0 = OFF
f
1 = manual
2 = auto
12.7.2 P401 PID Update Time
Sets the update time (P401 – 01 or -02) for the corresponding PID system (1 or 2).
Normally the controller is updated each time the process value is updated (every 300 ms).
However in unstable or slow reacting systems the controller update can be programmed to
update on a multiple of the process value update. A high value can introduce instability (
f
= 1).
Entry:
1 = 300 ms
2 = 600 ms
3 = 900 ms, etc.