Specifications

LA Series Linear Servo Amplifier Technical Reference Manual

10.6.2 Serial Parameter Settings

The user parameter settings are configured either by jumpers or via the serial interface. When jumpers

are used, the serial interface can only be used to read the jumper settings. If no jumpers are installed, the

software settings are used. If the configuration when using jumpers results in no jumpers being installed

(Sine Mode with all minimum values), place a jumper on JP1-G. This will force the drive to read and use

the jumper settings. The use of this jumper in Sine mode will not affect operation.

When no jumpers are installed, the settings are controlled from software using P values as shown below.

To use the serial interface to configure the settings, remove all jumpers and use the values as described

below for the Pn locations. Note that if any jumper is installed, all jumper settings will be read and used for

setting the parameters.

P – Parameter Command

This command is used to view or set the user parameters and RAM locations in the drive. The following

list shows software variables and their corresponding “P” access number. Be VERY careful when changing

these values, as the software does not provide for protection from improper settings. Adverse settings may

cause “undesirable” effects on the system.

The values for P0-P6 reflect the jumper settings as described above when jumpers are installed and

cannot be changed from the serial interface. When no jumpers are installed, these values can be modified

using the serial interface by changing the appropriate Pn value to configure the drive as if jumpers were

present.

P0 Transconductance setting

P1 Absolute Overcurrent Trip setting

P2 Overcurrent Trip setting

P3 Overcurrent Trip Time setting

P4 Input Filter setting

P5 Sine/ Hall mode setting

P6 Current Loop Bandwidth setting

P7 Motor Reverse setting

Note: P8-P255 are system values that should not be changed by the user.

To set a parameter value, type P followed by the address (0-6) followed by a space followed by the value

followed by <Enter> (Cr Lf). Refer to the next page for the P values and their settings.

Example: Set P1 Absolute Overcurrent Trip to 15.0 Amps.

Type: P1 1<Enter>

Drive response: 1

To view a parameter setting, type P followed by the address (0-6) followed by Enter.

Example: View the Overcurrent Trip setting:

Type: P2 <Enter>

Drive response: 1 (or whatever the present value is)