Inovance IS580-S Series Injection Molding Servo Drive User Guide: Operation Panel, Pressure/Speed Control and Fault Troubleshooting
Introduction to the IS580-S Series
The Inovance IS580-S series servo drive is a specialized high-performance drive engineered specifically for injection molding machine applications. As the technological successor to the IS300 series, the IS580-S implements advanced vector control technology for permanent magnet synchronous motors (PMSM) and is optimized for the unique process dynamics of plastic injection molding. The drive operates on a wide-voltage three-phase input of 380VAC to 480VAC, with a voltage fluctuation tolerance of -15% to +10%, ensuring reliable operation across global power grid variations.
Compared to its IS300 predecessor, the IS580-S delivers significant improvements: an average volume reduction of over 40% for the same power rating, enhanced hydraulic pressure control performance, faster pressure and speed response, reduced steady-state pressure fluctuation, and a more compact form factor. These advancements make the IS580-S particularly well-suited for plastic molding, pipe extrusion, shoe manufacturing, rubber processing, and metal die-casting applications where precise hydraulic control directly impacts product quality.
Injection Molding Application Optimization
Injection molding machines demand precise control over hydraulic pressure and flow rate throughout the molding cycle: injection, holding pressure, plasticization, and mold opening/closing. The IS580-S addresses these requirements through several application-specific optimizations.
Pressure and Speed Response Control
The IS580-S implements a dedicated pressure-speed dual-loop control architecture that simultaneously regulates hydraulic pressure and pump speed. During the injection phase, the drive prioritizes speed response to ensure rapid mold filling. During the holding pressure phase, it transitions to pressure-priority control to maintain precise packing pressure on the melt. This dual-loop approach ensures that both dynamic response and steady-state accuracy are optimized for each phase of the molding cycle.
The drive’s vector control algorithm achieves full torque output at zero speed, which is critical for maintaining holding pressure without pump rotation. The steady-state pressure fluctuation is minimized through advanced PID control with auto-tuning capabilities, ensuring consistent part quality across production runs.
Wide Voltage Range Design
The IS580-S accepts three-phase 380VAC to 480VAC input, accommodating the voltage standards of different regions without hardware modification. The wide voltage tolerance (-15% to +10%) ensures stable operation even in facilities with significant voltage fluctuations or during peak demand periods when grid voltage may sag.
Compatibility with Injection Molding Controllers
The IS580-S is designed to work seamlessly with injection molding machine controllers. It accepts analog speed and pressure commands from the host controller and provides feedback signals including motor speed, output torque, and fault status. The drive also supports CAN bus communication for digital command interface, reducing analog signal noise susceptibility in electrically noisy molding environments.
Operation Panel
The IS580-S features a comprehensive operation panel with an LED display and multiple indicator lights that provide real-time status feedback. The panel layout includes dedicated keys for common operations, reducing the number of menu navigation steps required during daily use.
Panel Layout and Indicators
The operation panel includes the following components:
| Component | Function |
|---|---|
| LED Display | Shows parameter values, operating status, and fault codes |
| RUN Key | Starts motor operation |
| STOP/RES Key | Stops motor operation; also serves as fault reset key |
| QUICK Key | Quick access to frequently used functions |
| PRG Key | Enters programming mode for parameter editing |
| ENTER Key | Confirms parameter changes |
| RUN Indicator | Illuminated when motor is running |
| LOCAL/REMOTE Indicator | Shows current control source (panel or external) |
| FWD/REV Indicator | Shows rotation direction |
| TUNE/TC Indicator | Flashes when a fault occurs; illuminated during tuning |
| Unit Indicators (RPM, %, A, V, Hz) | Indicate the unit of the displayed value |
Fault Display Interface
When a fault occurs, the drive cuts off output, the TUNE/TC fault indicator flashes, and the fault relay contacts activate. The LED display shows the fault code, and a sub-code provides additional diagnostic information. The panel can display the most recent three fault records, including the fault time, type, and operating conditions at the time of the fault (frequency, current, bus voltage, and I/O terminal status). This historical fault data is accessible through parameters F9-18 through F9-44.
Fault Reset Methods
The IS580-S supports four fault reset methods:
- DI reset: Assign a DI terminal to function 9 (fault reset) through parameters F4-00 to F4-04, then activate the reset signal.
- Panel reset: Press the STOP/RES key on the operation panel. This is enabled by default (F7-02 = 2).
- Power cycle reset: Disconnect the main power supply, wait for the panel display to disappear, then reapply power.
- Communication reset: Write the value 7 to communication address 2000H from the upper-level controller to reset the fault after the fault condition has been cleared.
Pressure and Speed Response Control
Analog Input Configuration
The IS580-S provides three analog input channels (AI1, AI2, AI3) that accept speed and pressure commands from the injection molding controller. Each analog input supports both voltage (0-10V) and current (0-20mA or 4-20mA) input modes, selectable through jumper settings on the control board. The analog input resolution is sufficient for precise pressure regulation, and the inputs include hardware filtering to reject high-frequency noise from the molding environment.
AI3 is typically dedicated to pressure sensor feedback, providing closed-loop pressure regulation. The pressure sensor signal is processed through a PID control loop within the drive, with PID gains adjustable through parameters F4-28 through F4-31. The drive supports pressure sensor zero-point calibration, which must be performed with no hydraulic pressure applied to ensure accurate feedback.
Analog Output Channels
Two analog output channels (AO1, AO2) provide real-time monitoring signals to external instruments or the host controller. These outputs can be configured to represent motor speed, output torque, output current, bus voltage, or other monitored variables. The analog output scale and offset are adjustable through the F9 parameter group.
PID Control for Pressure Regulation
The IS580-S implements a sophisticated PID control loop for hydraulic pressure regulation. The pressure feedback from the pressure sensor (connected to AI3) is compared with the pressure command (from AI1 or AI2), and the PID controller adjusts the motor speed to minimize the error. Key PID parameters include:
| Parameter | Function | Typical Setting |
|---|---|---|
| F4-28 | Pressure PID proportional gain | Adjusted during commissioning |
| F4-29 | Pressure PID integral gain | Adjusted for steady-state error elimination |
| F4-30 | Pressure PID differential gain | Set to zero for most applications |
| F4-31 | Pressure PID filter time constant | Adjusted to reduce sensor noise |
The PID auto-tuning function can automatically determine appropriate gain values by injecting a test signal and analyzing the system response. This significantly reduces commissioning time compared to manual PID adjustment.
Dual-Pump and Multi-Pump Configurations
Modern injection molding machines increasingly employ dual-pump or multi-pump hydraulic systems to improve energy efficiency and response speed. The IS580-S supports these configurations through its CAN bus communication interface, enabling coordinated control of multiple servo-driven pumps.
Dual-Pump Synchronization
In a dual-pump system, two IS580-S drives each control a hydraulic pump, with one designated as the master and the other as the slave. The master drive receives the speed and pressure commands from the injection molding controller and distributes command signals to the slave drive via CAN communication. Both drives share pressure feedback, ensuring that the total hydraulic output matches the demanded pressure and flow rate.
The dual-pump configuration offers several advantages over single-pump systems: higher maximum flow rate for fast injection, improved low-flow precision by using only one pump during low-demand phases, redundant operation capability, and reduced energy consumption through load sharing.
Multi-Pump Coordination
For large-tonnage injection molding machines, three or more pumps may be required. The IS580-S supports multi-pump configurations through CAN bus networking, with each drive assigned a unique node address. The master controller manages the overall hydraulic demand and distributes commands to each pump drive based on the current operating phase and flow requirements. Individual pump drives can be enabled or disabled dynamically, allowing the system to optimize energy consumption by running only the pumps needed for the current phase.
Control Board Terminals and Wiring
Control Terminal Functions
The IS580-S control board provides the following terminal groups:
| Terminal | Type | Function |
|---|---|---|
| AI1/AI2 | Analog Input | Speed command or pressure command input |
| AI3 | Analog Input | Pressure sensor feedback input |
| AO1/AO2 | Analog Output | Monitor signal output (speed, torque, etc.) |
| DI1-DI5 | Digital Input | Multi-function digital inputs (run/stop, fault reset, etc.) |
| DO | Digital Output | Multi-function digital output (max 50mA drive capacity) |
| TA/TB/TC | Relay Output | Fault relay output with normally open and normally closed contacts |
| CAN/485 | Communication | CAN bus and RS-485 communication interface |
| +15V/-15V/+5V | Power Supply | Auxiliary power output for external sensors |
| COM/+24V/GND | Power Supply | Control power terminals for DI/DO circuits |
Digital Input Wiring (Sink vs. Source)
The DI terminals support both sink (NPN) and source (PNP) wiring configurations. For sink wiring, the internal 24V power supply drives the DI circuit through the J7 jumper configured in the sink position. For source wiring, an external 24V power supply is required, the J7 jumper must be set to the source position (shorting pins 2 and 3), and the external 0V must be connected to the OP terminal.
When multiple IS580-S drives are used in the same system with sink wiring, the DI terminals can be paralleled across drives. However, in source wiring mode, each drive must use an independent external power supply, or the common grounds must be properly bonded to prevent ground loop currents.
Digital Output and Relay Wiring
The digital output terminal supports a maximum drive current of 50mA and must use an external 24V power supply. When driving inductive loads such as relay coils, an absorption diode must be installed across the relay coil with correct polarity. Incorrect diode polarity will cause immediate short-circuit of the 24V supply when the DO activates.
The relay output (TA/TB/TC) provides dry contacts rated for both AC (220VAC) and DC (24VDC) loads. For inductive loads, varistors or RC absorption circuits should be installed across the relay contacts to suppress voltage spikes during contact opening.
PG Card Configuration
The IS580-S includes a built-in resolver PG card (IS580-S-PG-RT1) that interfaces with the motor’s resolver feedback. The PG card provides a DB9 connector for motor connection and supports resolver excitation at 10kHz with a resolution of 12 bits. The PG card includes diagnostic LEDs (D5, D6) that indicate normal operation, phase-locked loop unlock, signal amplitude overflow, and signal amplitude insufficiency conditions.
The resolver’s DC resistance must exceed 17 ohms for proper PG card operation, and resolvers with more than 4 pole pairs should be avoided to prevent PG card overload. Signal cable shielding must be connected to the PG card’s PE terminal for effective electromagnetic interference suppression.
Fault Codes and Troubleshooting
The IS580-S fault code system covers a comprehensive range of failure modes specific to injection molding servo applications. The following table presents the key fault categories and their troubleshooting approaches:
Fault Code Reference Table
| Fault Category | Display | Common Causes | Troubleshooting Actions |
|---|---|---|---|
| Current detection fault | E.OC1/E.OC2/E.OC3 | Ground short, brake transistor short, parameter identification not performed, acceleration too fast | Check output wiring; disconnect brake resistor for isolation test; perform motor parameter identification; increase accel/decel time |
| Overvoltage | E.OU1/E.OU2/E.OU3 | Input voltage too high, regenerative energy during deceleration, motor shorted to ground | Verify input voltage; install brake resistor and unit; check motor cable insulation |
| Undervoltage | E.LU | Input voltage below specification, bus voltage abnormal, rectifier or buffer resistor fault | Check input voltage; inspect rectifier bridge and buffer resistor; consult technical support |
| Drive overload | E.OL1 | Load too large, motor stall, drive undersized | Reduce load; check mechanical system; upgrade to larger drive |
| Input phase loss | E.PH1 | Three-phase input missing one phase, drive board or lightning protection board fault | Check input wiring; inspect drive board and rectifier bridge |
| Output phase loss | E.PH2 | Motor open circuit, drive output cable fault, IGBT module fault | Check motor winding resistance; verify output cable continuity; inspect IGBT module |
| Module overheat | E.OH1 | Ambient temperature too high, air path blocked, fan failed, thermal sensor damaged | Reduce ambient temperature; clean ventilation; replace fan; replace thermal sensor |
| External fault | E.EF | External fault signal via DI terminal, emergency stop pressed | Clear external fault condition; verify mechanical system ready; reset |
| Communication fault | E.CE | Upper controller fault, communication cable fault, parameter misconfiguration | Check controller status; verify communication cable; verify FD group parameters |
| Contactor fault | E.CT | Drive board or power board fault, contactor failure, lightning protection board fault | Replace drive board, power board, contactor, or lightning protection board |
| Encoder fault | E.PG | Encoder direction detection error, angle calibration error | Check pulse signal wiring; verify motor parameter settings; check encoder line count |
| EEPROM read/write fault | E.EEP | Excessive parameter write frequency, board fault | Reduce parameter modification frequency; replace board |
| Motor ground short | E.GF | Motor cable shorted to ground, motor rotating during power-up | Check motor cable insulation; wait for motor to stop before power-up |
| Output phase short | E.SPO | Short circuit between U/V/W output phases | Check output cable for phase-to-phase short |
| CAN communication fault | E.CAN | Cable disconnection, severe interference, CANH/CANL reversed, never connected since power-up | Verify cable connection and shielding; check CAN bus load; verify A2-00 and A2-01 parameters |
| Speed deviation fault | E.SD | Encoder installation issue, power cable loose, PG card fault, torque limit too low | Check encoder and motor cable connections; increase F2-10 torque limit; replace PG card |
| Motor temperature fault | E.PTC/E.KTY | Motor overheating, temperature sensor open circuit, PG card cable fault, PTC short or reversed | Check motor cooling; verify sensor wiring; check PG card ribbon cable |
| Pressure sensor fault | E.PSF | Sensor cable loose, power supply fault, load too heavy (motor or pump jammed) | Check sensor wiring and power; verify F2-10 torque limit; perform motor auto-tuning |
Pressure Sensor Zero-Drift Learning Fault
A specific fault unique to injection molding applications is the pressure sensor zero-drift learning failure. This occurs when the drive attempts to calibrate the pressure sensor zero point but detects an abnormal reading. To troubleshoot: (1) ensure there is no hydraulic pressure at the sensor during calibration, (2) verify the pressure sensor wiring is correct by measuring AI3 voltage with a multimeter and comparing with the U0-32 monitor value, and (3) confirm that parameters F4-28 through F4-31 are correctly set for the sensor type and range.
Motor Parameter Identification
When the IS580-S is first commissioned or when a new motor is installed, motor parameter identification must be performed. This process measures the motor’s stator resistance, d-axis and q-axis inductances, and flux linkage. Failure to perform this identification when using FVC (Full Vector Control) or SVC (Sensorless Vector Control) modes will result in overcurrent faults during acceleration or deceleration. The identification procedure is initiated through the operation panel and requires the motor to be disconnected from the hydraulic pump for rotational measurement.
IS580-S Drive Specifications and Model Selection
Power Range and Voltage Classes
The IS580-S series covers a power range from 2.2kW to 75kW, addressing the full spectrum of injection molding machine sizes from compact 50-ton machines to large 1000-ton systems. The drives are available in 220V-class and 380V-class configurations. The 380V-class models are the most commonly deployed in injection molding applications due to the higher power requirements of hydraulic pump motors. The drive model designation follows the pattern IS580-S[SIZE][RATED CURRENT]I, where the rated current determines the maximum continuous output current available to the motor.
Drive selection must account for both the continuous and peak hydraulic power requirements of the injection molding machine. The peak power demand occurs during the injection phase, where high pressure and high speed are simultaneously required. The IS580-S provides 300% overload capacity for 3 seconds, which typically covers the peak demand during injection. However, if the peak demand exceeds this capability, a larger drive must be selected to avoid Er.02 (drive overload) faults during production.
Comparison with IS300 Predecessor
The IS580-S represents a generational upgrade from the IS300 series. Key improvements include: enhanced pressure control resolution achieved through higher-precision ADC sampling on the analog pressure input channels; faster speed loop response enabled by increased internal processing frequency; improved CAN bus communication reliability through hardware-level CRC checking and automatic retransmission; and expanded diagnostic capabilities including detailed fault sub-codes and historical fault logging. These improvements translate directly to better molding quality, with tighter dimensional tolerances and reduced reject rates, particularly in precision molding applications such as optical lenses and medical devices.
For existing IS300 installations, the IS580-S is designed as a drop-in replacement in terms of mechanical mounting and terminal layout, minimizing migration effort. Parameter conversion tools are available through the InoServoShop software to transfer IS300 parameter sets to the IS580-S format, though some parameters may require manual adjustment due to the enhanced feature set.
Conclusion
The Inovance IS580-S series servo drive represents a significant advancement in injection molding machine drive technology, building upon the proven foundation of the IS300 series with substantial improvements in power density, pressure control precision, and response speed. Its specialized pressure-speed dual-loop control architecture directly addresses the demanding requirements of modern injection molding processes, where consistent product quality depends on precise hydraulic control throughout each molding cycle.
The drive’s comprehensive operation panel, with dedicated fault display and multiple reset methods, simplifies daily operation and maintenance in production environments. The support for dual-pump and multi-pump configurations through CAN bus communication enables scalable hydraulic power systems that can match the demands of injection molding machines ranging from small precision molds to large-tonnage automotive parts.
The extensive fault code system, covering everything from current and voltage protection to pressure sensor diagnostics and encoder communication, provides maintenance personnel with the diagnostic tools needed to quickly identify and resolve issues. Combined with the drive’s wide voltage range design and robust EMI immunity, the IS580-S delivers reliable performance in the challenging electrical environment typical of injection molding facilities.