Mitsubishi Electric FR-D720S SC EC, Инструкция по эксплуатации, Страница: 301 / 512

Parameter Frequency setting by analog input (terminal 2, 4)
FR-D700 SC EC 6 - 151
Perform operation by analog input current
When the pressure or temperature is controlled constant by a fan, pump, etc., automatic
operation can be performed by inputting the output signal 0/4 to 20mA of the adjuster to across
the terminals 4-5.
The AU signal must be turned on to use the terminal 4.
Perform forward/reverse rotation by analog input (polarity reversible operation)
Setting "10" or "11" in Pr. 73 and adjusting Pr. 125 (Pr. 126) "Terminal 2 frequency setting gain
frequency" (Terminal 4 frequency setting gain frequency) and C2 (Pr. 902) "Terminal 2
frequency setting bias frequency" to C7 (Pr.905) "Terminal 4 frequency setting gain" makes
reverse operation by terminal 2 (terminal 4) valid.
Fig. 6-82:
Frequency setting by the function "Current
input 0/4–20mA" assigned to terminal 4
I001184E
Example
쑴
When performing reversible operation by terminal 2 (0 to 5V) input.
Set "11" in Pr. 73 to make reversible operation valid.
Set frequency at maximum analog input in Pr. 125 (Pr. 903).
Set 1/2 of the value set in C4 (Pr. 903) in C3 (Pr. 902).
Reversible operation is performed when 0 to 2.5V DC is input and forward rotation when
2.5 to 5V DC.
쑶
m
CAUTION:
When reversible operation is set, be aware of reverse rotation operation when analog
input stops (only the start signal is input).
NOTE
When reversible operation is valid, reversible operation (0 to 4mA: reverse operation, 4mA to
20mA: forward operation) is performed by terminal 4 in the initial setting.
Forward rotation
Frequency
setting
0/4–20mA DC
Presetting of set frequency value
using terminal 4 (0/4–20mA DC)
Current
input
equipment
Forward
rotation
Not reversible
Reverse
rotation
Reversible
Terminal 2 input [V]
Set frequency [Hz]