Unipulse F805AT-BC, Operation Manual

Page: 100 / 202

6.SETTING AND ADJUSTMENT OF READING
85
6-8-3. AT coordin time, AT coordinate 1 –4, AT coordin out 1 -4
These parameters are used in auto coordination mode.
AT COORDIN OUT and AT COORDINATE parameters play an important role in
determining the initial control rate in other operation modes.
* Operation in CONT. FEED RATE and CONT. TOTAL mode may be inhibited
unless:
AT Coordin Out 1 < AT Coordin Out 2 < AT Coordin Out 3 < AT Coordin Out 4
AND
AT Coordinate 1 < AT Coordinate 2 < AT Coordinate 3 < AT Coordinate 4
Operation
Tip for PID parameter adjustment
Do not adjust more than one parameter at a time, since the result of each
adjustment may not be obvious. First, set Differential (D) to “0.00” and try to
adjust P parameter (note that I parameter is factory-set, use this initial value). Once
an appropriate P value is found, check if there is any residual offset. If offset is
found, then adjust I parameter. Finally try to adjust D parameter. The effect of D
modification may be more visible if the target value is changed rapidly.
Range: 1 – 99 sec (2 digits, no decimal place)
Range: 0 – 99999 (5 digits, decimal place floating with flow)
→ →
Range: 0.0 – 100.0% (4 digits, decimal place fixed to 1
st
place)
PAGE
MODE EACH CODE
→
AT COORDIN TIME
→
MODE EACH CODE
→
AT COORDINATE 1-4
→
MODE EACH CODE → AT COORDIN OUT 1-4
Flow ([t/h], [kg/h])
Control rate [%]
0
f1
c4
100
c3
c2
c1
f2 f3 f4
Feeder characteristic curve
Approximate characteristic
f1- f4: AT Coordinate 1-4
c1- c4: AT Coordin Out 1-4
curve