Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

Page: 631 / 1218

Parameters (T) Multi-Function Input Terminal Parameters
FR-A800 5 - 429
Calibration of analog input bias and gain
(C16 (Pr. 919) to C19 (Pr. 920), C38 (Pr. 932) to C41 (Pr. 933))
●
The "bias" and "gain" functions are used to adjust the relationship between the setting input signal
such as 0 to 5 V DC/0 to 10 V DC or 4 to 20 mA DC entered from outside for torque command or
setting the torque limit and the torque.
●
Set the bias torque of the terminal 1 input using C16 (Pr. 919).
(Shipped from factory with torque for 0 V)
●
Set the torque against the torque command voltage set by Pr. 73 "Analog input selection" with
C18 (Pr. 920). (Initial value is 10 V.)
●
Set the bias torque of the terminal 4 input using C38 (Pr. 932).
(The initial value is the torque for 4 mA.)
●
Set the torque against the 20 mA for torque command current (4 to 20 mA) with C40 (Pr. 933).
I002648E
Fig. 5-204: Signal adjustment of terminal 1
I002649E
Fig. 5-205: Signal adjustment of terminal 4
400
150
0
0
0
Gain
C18 (Pr. 920)
Torque setting signal
5 V
10 V
C19 (Pr. 920) C17 (Pr. 919)
Calibration example of terminal 1
Bias
C16 (Pr. 919)
To
rq
u
e
(
%
)
(-5 V)
(-10 V)
-100 %
Initial value
*
* A negative voltage (0V to -10 V (-5 V)) is valid as a torque command.
If a negative voltage is input as a torque limit value, the torque limit is regarded as "0".
400
150
To
rq
u
e
(
%
)
Bias
C38
(Pr. 932)
Gain
C40
(Pr. 933)
100 %
20 mA
C41 (Pr. 933)
Torque setting signal
0 20
0 4
C39 (Pr. 932)
Initial value
Calibration example of terminal 4