Process Value - Toshiba TOSVERT VF-PS1 Instruction Manual

4.1.2. Process value

Input the target value against the feedback value as process value.
1. Select the process value input from parameter fmod or f207.
VI/II (voltage/current input)
RR/S4 (potentiometer/voltage input)
RX (voltage input)
Operation panel input enabled (including LED/LCD
panel option input)
Operation panel RS485 (2-wire) communication input
Internal RS485 (4-wire) communication input
Communications option input
Optional AI1 (differential current input)
Optional AI2 (voltage/current input)
UP/DOWN frequency
Optional RP pulse input
Optional High-speed pulse input
-
Speed type
You can add or multiply for process value by override function.
Note) Dancer control use override addition function for speed reference.
2. Convert the feedback input level into frequnency, and set it.
<Note>
You need to input the process value less than maximum of feedback value.
If the process value is setted maximum of feedvack value or more, the feedback value reaches
maximum and the deviation becomes zero. The output frequency is fixed because the feedback
value does not become high level anymore.
You can set upper limit of process value input by parameter f367: Process upper limit.
1) Analog input
See the chapter 6 for detail of analog input characteristic setting.
[Example of process value setting]
Condition: Pressure control as PID control
Input the feedback signal of 1 to 2 atm into VI/II terminal by 4 to 20mA signal.
Input the process value into RR/S4 terminal by 0 to 10V signal.
Description
Frequency setting mode selection 1 (fmod)
Frequency setting mode selection 2 (f207)
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