227
Special operation and speed control
Take caution when the following condition is satisfied because the drive unit recognizes the deviation value as
a negative (positive) value even though a positive (negative) deviation is given:
Pr. 934 PID display bias coefficient
>
Pr. 935 PID display gain coefficient
To perform a reverse operation, set the forward operation in
Pr. 128 PID action selection
. To perform a forward
operation, set the reverse operation in
Pr. 128
. In this case, the PID output shutoff release level is (1000 -
Pr.
577
).
(Example) Set the following:
Pr. 934
= "500" and
20% (4mA is applied),
Pr. 935
= "100"
and 100% (20mA is applied).
When the set point=400 and the
measured value=360, the deviation is
+40 (>0), but the drive unit recognizes
the deviation with -10% (<0). Because of
this, operation amount does not
increase in the reverse operation
setting.
The operation amount increases when
the forward operation is set.
To perform PID output shutoff release at
deviation of +40 or higher, set
Pr. 577
=
"960."
(12) Analog input display unit changing
(Pr. 241)
You can change the analog input display unit (%/V, mA) for analog input bias/gain calibration.
Depending on the terminal input specification set to
Pr. 73
,
Pr. 267
, and voltage/current input switch the display
units of
C43 (Pr. 934), C45 (Pr. 935)
change as shown below.
If the
Pr. 241
setting is changed, the units of
C3 (Pr. 902), C4 (Pr. 903), C6 (Pr. 904), and C7 (Pr. 905)
will change
too.
(Refer to page 153.)
Pr. 934 < Pr. 935
(normal setting)
Pr. 934
Pr. 935
Reverse operation
Reverse operation
setting to
Pr. 128
Reverse operation
Forward operation
setting to
Pr. 128
Forward operation
Forward operation
setting to
Pr. 128
Forward operation
Reverse operation
setting to
Pr. 128
PID output shutoff release
level
Pr. 577
- 1000
PID output shutoff release
level
1000 -
Pr. 577
Analog Command (terminal 4)
(depending on
Pr. 73, Pr. 267,
and
voltage/current input switch)
Pr. 241 =
0 (initial value)
Pr. 241 =
1
0 to 5V input
0 to 5V
0 to 100% (0.1%) display
0 to 100%
0 to 5V (0.01V) display
0 to 10V input
0 to 10V
0 to 100% (0.1%) display
0 to 100%
0 to 10V (0.01V) display
0 to 20mA input
0 to 20mA
0 to 100%(0.1%) display 0 to 100%
0 to 20mA (0.01mA) display
Parameters referred to
Pr. 59 Remote function selection
Pr. 73 Analog input selection
Pr. 79 Operation mode selection
Pr. 178 to Pr. 182 (input terminal function selection)
Pr. 190, Pr. 192 (output terminal function selection)
Pr. 561 PTC thermistor protection level
C2 (Pr. 902) to C7 (Pr. 905) Speed setting voltage (current) bias/gain
0
100%
500
20%
100
400
360
(0%) (25%)(35%)
(100%)
Set point
Measured value
Deviation -10%
* ( ) indicates the deviation value
which the drive unit can
recognize
Dev40
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Страница 294: ...291 APPENDIX This chapter provides the APPENDIX of this product Always read the instructions before using the equipment ...