172
PID input is given by external analog signal AI2 (0
~
10V).
3
:
pulse setting
PID input is given by external impulse signal.
4
:
RS485 communication
PID input is given by communication.
5 : given pressure(Mpa,Kg)
6 : given by panel potentiometer
F8.02
Digital reference input
0.0
~
100.0
%
50.0%
This function realized input setting of closed loop control via keypad when analog feedback is used. It is only effective
when digital setting of closed loop setting channel is selected (F8.01=0).
For example
:
in closed loop control system of constant pressure water supply, this function code setting should take into
full account of measuring range of transmissible pressure gauge and its feedback signal output. If the measuring range is
0
~
10Mpa, the corresponding voltage output is 0
~
10V, then we need pressure of 6MPa, and set the digital value as
6.00V, so the needed pressure is 6MPa when PID regulation is steady.
F8.03
PID feedback channel
0
~
7
0
0
:
AI1
PID feedback is given by external analog signal AI1.
1
:
AI2
PID feedback is given by external analog signal AI2.
2
:
AI1+AI2
PID feedback is given by AI1 and AI2.
3
:
AI1-AI
2
PID feedback is determined by difference of AI1 and AI2. When the difference is negative, the feedback value is 0.
4
:
MAX
{
AI1
,
AI2
}