PL-565 Accumass BW500 Page 73
Parameters
Proportional Integral Derivative (PID) Control Parameters,
(P400 – P418)
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 (eg.
zero, span, factor, material test)
P400 PID System
Enables the selected PID system, systems 1 or 2 (P400 – 01 or – 02).
Entry:
0 = off
f
1 = manual
2 = auto
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
P402 PID Process Value Source
Determines the source of the process value (P402 – 01 or – 02) for the corresponding
PID system (1 or 2)
The process value is the value that the controller is trying to match with the setpoint. (f=1)
Enter:
1 = rate
f
2 = load
3 = mA input 1
4 = mA input 2
P405 Proportional Term
Sets the proportional term (P405-01 or -02) for the corresponding PID system (1 or
2). (f=0.400)
The proportional term is the proportional gain. A gain of 1 is equivalent to a
proportional band of 100%.
To Next Page
Loading...