Inovance IS600P Series Servo Drive User Guide: Operation Panel, Position Control, Electronic Gear Ratio, CN1 Terminal Wiring and Fault Troubleshooting

The Inovance IS600P series servo drive is a pulse-input servo drive system designed for CNC machine tools, automation equipment, and precision positioning applications. Available in power ratings from 100W to 7.5kW, the IS600P supports both single-phase 220V and three-phase 220V/380V power inputs. It features a 2500-line incremental encoder interface, high-speed pulse input up to 4 MHz, and supports position, speed, and torque control modes. The IS600P is specifically engineered for applications requiring external pulse command input, making it ideal for integration with PLCs, motion controllers, and CNC systems.

1. Operation Panel and Status Indicators

The IS600P servo drive is equipped with an LED operation panel that provides parameter configuration, status monitoring, and jog operation capabilities. The panel communicates with the drive through an RJ45 interface and can be used for both commissioning and daily operation.

1.1 LED Display and Key Functions

The operation panel features a 5-digit LED display that shows operational status, parameter codes, monitored values, and alarm codes. The display uses a hierarchical menu structure for parameter navigation:

• Group Level: Parameters are organized into functional groups prefixed with H (e.g., H00 for motor parameters, H01 for drive information, H02 for basic setup, H03 for DI terminal parameters, H05 for position control, H06 for speed control, H07 for torque control, H08 for gain adjustment, H09 for vibration suppression, H0A for auxiliary functions, H0B for monitoring, H0D for fault management).
• Function Code Level: Individual parameters within each group, identified by a two-digit suffix (e.g., H05-07 for electronic gear ratio numerator).
• Parameter Value Level: The actual setting value that can be modified.

The panel keys and their functions are:

1.2 Status Display Modes

The LED panel displays different status indicators depending on the drive state:

In monitoring mode, the panel can display real-time values such as motor speed (H0B-00), speed command (H0B-01), torque command (H0B-02), position command counter (H0B-13), feedback pulse counter (H0B-17), bus voltage (H0B-26), AI input values (H0B-21/H0B-22), and motor angle (H0B-10).

1.3 Parameter Setting Workflow

To modify a parameter on the IS600P:

1. Press MODE to enter parameter setting mode. The display shows the group number (e.g., H05).
2. Use UP/DOWN to select the target group, then press SET to enter the function code level.
3. Use UP/DOWN to select the function code (e.g., 07 for H05-07), then press SET to enter the value level.
4. Use SHIFT to select the digit to modify, then use UP/DOWN to change the value.
5. Press SET to confirm and save the value.

2. Position Mode Control with External Pulse Input

The IS600P is designed primarily as a pulse-input position control servo drive. In position mode (H02-00 = 1), the drive receives pulse commands from an external controller through the CN1 connector and executes precise positioning based on the pulse count, direction, and electronic gear ratio settings.

2.1 CN1 Terminal Overview (44-Pin DB44 Connector)

The IS600P CN1 connector is a 44-pin D-sub connector that provides all control signals including pulse inputs, digital I/O, analog I/O, and encoder divider outputs. The key terminals for position control are:

2.2 Pulse Input Wiring Configurations

The IS600P supports three types of pulse input wiring, depending on the upper controller’s output capabilities:

Configuration A: Low-Speed Differential Input (Max 500k pps)

When the controller has differential line driver outputs (RS-422 compatible), connect directly to PULSE+/PULSE-/SIGN+/SIGN- terminals. This is the most reliable method for standard-speed applications.

Configuration B: Low-Speed Open Collector Input (Max 200k pps)

When the controller has NPN open-collector outputs, use the internal 24V power supply or an external power supply with the PULLHI terminal.

Configuration C: High-Speed Differential Input (Max 4M pps)

For high-speed applications such as CNC machining centers, use the dedicated high-speed pulse input terminals.

2.3 Position Mode Parameter Configuration

To configure the IS600P for position control with external pulse input, set the following parameters:

Step 1: Set control mode to position mode

Step 2: Set position command source

Step 3: Select pulse input terminal

Step 4: Select pulse command format

Step 5: Configure servo enable (S-ON) signal

2.4 Pulse Command Direction Control

The IS600P provides a position command direction switch function (FunIN.27: POSDirSel). When assigned to a DI terminal, this function allows the user to reverse the direction of position commands without changing the wiring or controller program.

Additionally, a pulse inhibit function (FunIN.13: INHIBIT) can be assigned to a DI terminal to temporarily disable pulse command input without disabling the servo. This is useful for pausing motion without losing position.

3. Electronic Gear Ratio Calculation and Fixed-Length Positioning Example

3.1 Electronic Gear Ratio Formula

The electronic gear ratio on the IS600P defines the scaling between the command pulse count from the controller and the actual motor encoder feedback pulses. It allows the user to match the controller’s pulse output resolution to the mechanical system’s requirements.

When H05-02 = 0 (default), the electronic gear ratio is set using numerator and denominator parameters:

The complete formula is:

Where:

• B (H05-07): Electronic gear ratio numerator 1 (range: 1 to 1073741824)
• A (H05-09): Electronic gear ratio denominator 1 (range: 1 to 1073741824)
• Encoder Resolution: For IS600P, the encoder resolution is 10000 pulses per revolution (2500-line encoder with 4x quadrature decoding)
• Load Displacement per Rev: The linear or rotary displacement of the load per motor revolution (in command units)
• m/n: Mechanical reduction ratio (motor rotates m revolutions, load shaft rotates n revolutions)

The IS600P also supports a second electronic gear ratio (H05-11/H05-13), which can be switched during operation using the FunIN.24 (GearRatioSel) DI function. This enables applications that require two different positioning resolutions.

3.2 Position Command Filtering

The IS600P provides two filtering options for position commands to smooth motor rotation:

3.3 Practical Fixed-Length Positioning Example

Consider a CNC linear axis with the following specifications:

• Target movement: 100 mm
• Ball screw pitch: 10 mm per revolution (1 motor revolution = 10 mm linear travel)
• Encoder resolution: 10000 pulses per revolution (IS600P standard with 2500-line encoder, 4x quadrature)
• Desired command resolution: 1 micrometer per pulse (0.001 mm/pulse)
• No external gearbox (direct coupling, m/n = 1/1)

Step 1: Calculate required motor revolutions

Step 2: Calculate encoder feedback pulses for target movement

Step 3: Calculate required command pulses from controller

Step 4: Calculate electronic gear ratio

Alternative Example: 10 micrometer per pulse resolution

Example with gearbox (reduction ratio 3:1):

3.4 Position Deviation Clear Function

The IS600P provides a position deviation clear function (FunIN.35: ClrPosErr) that zeros the accumulated position error. This is useful when:

• Re-establishing position reference after a mechanical adjustment
• Clearing residual position error after an emergency stop
• Preparing for a new positioning sequence

4. Fault Codes and Troubleshooting Solutions

The IS600P servo drive classifies faults and warnings into three severity levels:

• NO.1 (Class 1): Most severe – includes non-resettable faults (require drive replacement) and resettable faults (require S-ON off before reset)
• NO.2 (Class 2): Moderate severity – resettable faults (require S-ON off before reset)
• NO.3 (Class 3): Warnings – resettable without disabling servo

Faults can be reset by setting H0D-01 = 1 or using DI function FunIN.2 (ALM-RST, edge-triggered).

4.1 Class 1 Non-Resettable Faults (Drive Replacement Required)

4.2 Class 1 and Class 2 Resettable Faults

4.3 Position Control Specific Faults

4.4 Warnings (Class 3, Resettable Without Disabling Servo)

4.5 Startup Troubleshooting for Position Mode

When the motor does not rotate after inputting position commands, check the following:

1. Verify panel status: The panel should display “run” (not “rdy”). If “rdy”, check S-ON signal wiring and H03 group DI settings.
2. Check position command counter: Monitor H0B-13 (input position command counter). If it remains 0, no pulse is being received.
   • Verify H05-00 = 0 (pulse command source)
   • Verify H05-01 matches the physical wiring (low-speed or high-speed port)
   • Check pulse input wiring (PULSE+/PULSE-/SIGN+/SIGN- or HPULSE+/HPULSE-/HSIGN+/HSIGN-)
   • Check if FunIN.13 (INHIBIT) or FunIN.37 (PulseInhibit) is active, blocking pulse input
3. Check direction reversal: If H0B-13 shows a negative value, verify:
   • H05-15 (pulse format) matches the actual pulse output format from the controller
   • FunIN.27 (POSDirSel) direction switch is not accidentally activated
   • H02-02 (motor rotation direction) is set correctly
4. Check positioning accuracy: If positioning is inaccurate, verify the relationship:
   Pout = Pin (output command = input command)
   Pin x Gear Ratio = Pf (input command x gear ratio = feedback pulses)
   Pf x Delta_L = PL (feedback pulses x displacement per pulse = mechanical position)

   If Pout != Pin: Check pulse input wiring for noise (use twisted-pair shielded cable)
   If Pin x Ratio != Pf: Check if servo was disabled during motion or position deviation was cleared
   If Pf x Delta_L != PL: Check for mechanical slippage between motor and load

4.6 Fault Reset Procedure

To reset faults on the IS600P:

1. For NO.1 and NO.2 faults: First disable the servo (S-ON off), then either:
   • Set H0D-01 = 1 (fault reset), or
   • Trigger DI function FunIN.2 (ALM-RST) with a pulse of at least 3 ms duration
2. For NO.3 warnings: Directly set H0D-01 = 1 or trigger FunIN.2 (no need to disable servo first).
3. For parameters requiring power cycle: If the fault is related to a parameter change, disconnect and reconnect control power (L1C/L2C) after modifying the parameter.

5. Commissioning and Maintenance

5.1 Initial Commissioning Steps

1. Power-on check: Apply control power (L1C/L2C) and main power (R/S/T or L1/L2). The panel should display “rdy”.
2. JOG test: Use the panel JOG function to verify motor rotation direction. If reversed, either swap U/V/W wiring or change H02-02.
3. Inertia identification: Perform load inertia identification (H08-15) if the load inertia ratio is unknown. This can be done via the IS-Opera software or panel parameters.
4. Gain adjustment: Use auto gain adjustment or manually set the rigidity level (H08-00) based on the application requirements.
5. Position accuracy verification: Send a known pulse count and verify the mechanical displacement matches the calculation.

5.2 IS-Opera Software

The IS600P is supported by the IS-Opera PC software (available from www.inovance.cn), which provides:

• Oscilloscope for real-time signal monitoring
• Parameter management (batch read/write)
• Inertia identification with guided motion sequences
• Mechanical resonance analysis
• JOG motion planning
• Gain adjustment with visual feedback
• Electronic cam configuration (for supported models)

Communication is via the standard PC communication cable (S6-L-T00-3.0) or a self-made cable following the wiring specification in the manual.