Unipulse F805AT-BC, Operation Manual

Page: 95 / 202

6.SETTING AND ADJUSTMENT OF READING
80
6-7-10. Start coordin. value
You can directly specify the initial control rate using this menu item (4-20 mA output is
assigned to 0.0 – 100%).
If this parameter is set to non-zero value, control rate of start-up and fixed control rate
operation is calculated using this value, ignoring AT COORDINATE 1-4 and AT
COORDIN OUT 1-4.
* If Start Coordin. Value is modified while control operation, control rate is changed to
the set output, then move to PID control.
To use initial control rate calculated from AT COORDINATE 1-4 or AT COORDIN
OUT 1-4, Start Coordin. Value must be set to zero.
Operation
Note: when to use LOCK operation
In CONT.FEED RATE and CONT.TOTAL mode, LOCK operation using the initial
control rate is performed when:
System startup (when Start Time expired) * during first stability time
Target alteration * during flow stability time
Abnormal flow * until normal flow state is restored
When restored from abnormal flow * during flow stability time
Control limit over * until normal condition is restored
When restored from control limit over * during flow stability time
Control rate
Start Coordin.
target after change
target before change
=
×
* The system tracks external target input in real time.
after modification
Value at the time
of target
modification
Range: 0.0 – 100.0 % (4 digits, decimal place fixed to 1
st
position)
MODE CTRL. PARAMETER → → PAGE START COORDIN.VALUE →