KOLLMORGEN Digifas-7200 Digital Servo Amplifier Application Guide

Parameter setting and debugging process

4.1 Parameter Classification

Amplifier parameters are divided into the following categories:

General parameters: such as motor pole pairs, language, brake enable, position interface type (ROD/SSI), etc.

Current controller parameters: including effective current, peak current, I ² t threshold, proportional gain, and integration time.

Speed controller parameters: including proportional gain, integration time, set point ramp, limit switch function, phase compensation, etc.

Service functions: such as constant speed, constant current, reciprocating operation and other testing modes.

4.2 Debugging steps

Hardware inspection: Confirm that the motor matches the amplifier and that the wiring conforms to the drawing.

Power on: First connect the 24V auxiliary power supply, then connect the main power supply.

Software connection: Connect to the PC through the SubD9 interface and run the BS7200 operating software.

Parameter initialization: Set the number of poles, encoder type, braking parameters, etc. based on the motor model.

Controller tuning: Gradually adjust the parameters of the current loop and speed loop to optimize dynamic response.

Functional testing: Enable service functions such as limit switches and brake control to verify system behavior.

4.3 Status Monitoring and Diagnosis

The amplifier provides real-time status display, including:

Internal temperature, heat sink temperature

Intermediate circuit voltage, actual output current

Braking power, motor speed, mechanical angle

Run time statistics

Fault information is prompted through red LED and PC interface. Common faults include: undervoltage/overvoltage, output stage fault, brake short circuit, encoder error, etc. All faults will trigger the BTB relay to disconnect, cutting off the system enable.

Optional features and interface extensions

5.1 Incremental Encoder and SSI Interface

The standard version provides incremental (ROD) or SSI absolute value position output. ROD output supports 500-1024 pulses per revolution, with adjustable zero position; The SSI interface supports 12 bit single loop data, and the clock frequency can be selected from 200kHz or 1.5MHz.

5.2 Controllable torque limit (- IL - option)

This external module limits motor torque in real-time by simulating voltage (0-10V), making it suitable for scenarios such as tension control and flexible assembly. The module integrates a speed controller, which can accept two speed setting inputs and has the function of enabling and interlocking with the limit.

5.3 PC Operating Interface

Through BS7200 software, users can fully access parameter tables, monitor curves in real-time, and save/load configurations. The software supports MS-DOS system and requires at least 80386 processor, 1MB memory, and VGA display.

Maintenance, fault diagnosis, and disposal

6.1 Daily Maintenance

The amplifier is designed to be maintenance free, and unauthorized opening of the casing is prohibited. Surface cleaning can be done with isopropanol and should not be soaked or sprayed. After long-term storage (>1 year), the intermediate circuit capacitors need to undergo "reformation" treatment (by passing single-phase 230V AC for 30 minutes).

6.2 Common troubleshooting

The manual provides fault tree analysis, such as:

Communication failure: Check cable model, interface selection, and PC grounding.

Overvoltage fault: increase braking power, shorten deceleration ramp, parallel intermediate circuit.

Brake malfunction: Check for a short circuit in the brake coil or damage to the motor.

Output level fault: Check for motor cable short circuit, grounding or poor heat dissipation.

6.3 Scrapping and Recycling

The amplifier can be disassembled into components such as aluminum heat sinks, steel shells, electronic boards, etc., and should be disposed of by certified recycling companies to comply with environmental regulations.