Setting Amplifier Gain and Current Loop Gain
AG Command:
The AG command will set the amplifier gain (Amps/Volt). The AU command will set the current loop gain. The
AMP-43540 has 3 amplifier gain settings. The gain is set with the AG command as shown in Table A4.4 for AGm=n,
where m is a specific axis. The axis must be in a motor off (MO) state prior to execution of the AG command.
AG setting Gain Value
n = 0 0.4 A/V
n = 1 0.8 A/V
n = 2 1.6 A/V
Table A4.4: Amplifier Gain Settings
AU Command:
Proper configuration of the AU command is essential to optimize the operation of the AMP-43540. This command
sets the gain for the current loop on the amplifier. Table A4.5 indicates the recommended AUm=n settings for 24
and 48 VDC power supplies based on motor inductance. The axis must be in a motor off (MO) state prior to
execution of the AU command.
Vsupply VDC Inductance L (mH) n
24 L < 1 9
24 1 ≤ L < 2.3 10
24 2.3 ≤ L < 4.2 11
24 4.2 ≤ L 12
48 L < 2.4 9
48 2.4 ≤ L < 4.2 10
48 4.2 ≤ L < 7 11
48 7 ≤ L 12
Table A4.5: Amplifier Current Loop Gain Settings
A4 – AMP-43540 (-D3540, -D3520) ▫ 205 DMC-41x3 User Manual
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