Siemens 6SE7028-0ES87-2DA1 System-Ready AC Drive for SIMOVERT Masterdrives Architecture

Siemens 6SE7028-0ES87-2DA1 System-Ready AC Drive for SIMOVERT Masterdrives Architecture

The Siemens 6SE7028-0ES87-2DA1 is a high-performance AC drive module engineered for seamless integration within the SIMOVERT Masterdrives control system architecture. Rather than functioning as a standalone inverter, this unit is designed to operate as a coordinated node within a layered automation hierarchy — connecting the control layer, power conversion layer, I/O layer, and field bus communication layer into a unified, deterministic drive system. In demanding industrial environments where uptime, signal fidelity, and system scalability are non-negotiable, the 6SE7028-0ES87-2DA1 delivers the electrical performance and architectural compatibility required for long-term, reliable operation.

Within the SIMOVERT Masterdrives platform, this drive module interfaces directly with the SIMOVERT Masterdrives Compact Plus chassis and is designed to work in conjunction with the CU (Control Unit) boards such as the CU3 or VC (Vector Control) boards, enabling closed-loop vector control of AC induction and synchronous motors. The modular architecture of the Masterdrives platform allows engineers to configure the 6SE7028-0ES87-2DA1 as part of a multi-axis drive line-up sharing a common DC bus — a critical design feature for regenerative braking energy recovery and power balancing across axes in coordinated motion applications.

System architects integrating this module into a broader automation platform will find it fully compatible with PROFIBUS-DP communication via the CBP2 (Communication Board PROFIBUS) option board, enabling real-time parameter exchange, fault diagnostics, and speed/torque setpoint transmission from a SIMATIC S7-300 or S7-400 PLC controller. This tight integration between the drive layer and the PLC control layer ensures deterministic response times and eliminates the latency associated with analog signal chains. For applications requiring higher-level supervisory control, the drive can be monitored and parameterized through SIMATIC WinCC or STEP 7 engineering environments, providing a unified HMI and SCADA interface across the entire automation cell.

The 6SE7028-0ES87-2DA1 is rated for medium-voltage AC input and is suited for motor power ranges consistent with the 28A output current class within the Masterdrives series. Its power section is built around IGBT technology with integrated gate driver circuits, providing fast switching response and low harmonic distortion — essential for maintaining power quality in facilities with sensitive instrumentation or shared transformer infrastructure. The drive’s internal DC link capacitor bank supports ride-through capability during brief supply interruptions, reducing nuisance trips in process-critical applications.

From an I/O integration perspective, the drive module supports both digital and analog I/O expansion through the Masterdrives option board ecosystem. Terminal modules and signal conditioning boards can be mounted within the same drive cabinet, allowing local feedback signals from encoders, thermistors, and process transmitters to be processed at the drive level before being forwarded to the PLC via PROFIBUS. This distributed signal processing architecture reduces the I/O load on the central controller and improves overall system response time.

For system designers working on redundant drive architectures, the 6SE7028-0ES87-2DA1 can be configured in a hot-standby arrangement using external bypass contactors and drive changeover logic implemented in the SIMATIC S7 program. This redundancy design is particularly relevant in water treatment pump stations, petrochemical compressor drives, and power plant auxiliary systems where unplanned downtime carries significant operational and safety consequences. The drive’s parameterization data can be stored on a memory card (MMC) for rapid replacement and recommissioning — a feature that dramatically reduces mean time to repair (MTTR) in field service scenarios.

Long-term maintenance planning is supported by the drive’s built-in operating hour counters, fault history buffers, and load cycle logging. These diagnostic tools allow maintenance engineers to schedule preventive servicing based on actual operating conditions rather than fixed calendar intervals, extending the service life of both the drive and the connected motor. All units supplied by ZYPLC are covered by a 12-Month Warranty and have been functionally tested prior to dispatch, ensuring that replacement units arrive ready for immediate installation without the need for factory recalibration.

Architecture Specification Table

Coordinated Control System Design

The 6SE7028-0ES87-2DA1 achieves its full performance potential when deployed as part of a coordinated SIMOVERT Masterdrives system architecture. At the control layer, a SIMATIC S7-400 CPU (such as the CPU 414-3 DP) acts as the central coordinator, issuing speed and torque references to the drive via PROFIBUS-DP at cyclic update rates of 1–4ms. The CBP2 Communication Board PROFIBUS installed in the drive’s option slot provides the physical and protocol interface for this exchange, supporting both cyclic process data (PZD) and acyclic parameter access (PKW) channels simultaneously.

At the power supply layer, a SIMOVERT Masterdrives Rectifier/Regenerative Unit (such as the 6SE7031 series) feeds the common DC bus, from which the 6SE7028-0ES87-2DA1 draws its DC link voltage. This shared bus topology allows braking energy from decelerating axes to be absorbed by motoring axes, reducing overall energy consumption and eliminating the need for braking resistors in balanced multi-axis systems. A SIMOVERT Masterdrives Line Filter and Line Reactor are typically installed upstream of the rectifier to limit harmonic injection into the supply network.

At the I/O and signal conditioning layer, SIMATIC ET 200S distributed I/O modules mounted in the field provide local digital and analog signal acquisition — including motor thermistor inputs, encoder feedback, and process variable signals — which are transmitted to the S7 controller via PROFIBUS-DP on the same network segment as the drive. For human-machine interface requirements, a SIMATIC TP 177B HMI panel or SIMATIC WinCC flexible SCADA station provides operators with real-time drive status visualization, fault acknowledgment, and parameter adjustment capability without requiring direct access to the drive cabinet.

In multi-drive cabinet installations, SIMOVERT Masterdrives Inverter Modules of complementary power ratings (such as the 6SE7022 or 6SE7024 series) are mounted alongside the 6SE7028-0ES87-2DA1 on a shared chassis backplane, sharing the common DC bus and cabinet cooling infrastructure. Terminal expansion modules and shield connection clamps within the cabinet ensure proper EMC management and signal integrity across all drive and I/O wiring.

Application in Layered Automation Systems

The 6SE7028-0ES87-2DA1 is deployed across a wide range of industrial sectors where coordinated AC drive control is essential to process integrity and system availability.

In water and wastewater treatment facilities, this drive module controls high-power pump and blower motors in variable flow applications, where energy savings from variable speed operation are maximized through PID control loops executed in the SIMATIC S7 controller and setpoints transmitted to the drive via PROFIBUS. The drive’s ride-through capability and fault logging support the stringent uptime requirements of municipal water infrastructure.

In petrochemical and refinery environments, the 6SE7028-0ES87-2DA1 is used to drive compressor and agitator motors in hazardous area adjacent installations, where the drive cabinet is located in a safe area and the motor is installed in the classified zone. The PROFIBUS communication link allows remote monitoring and control from the DCS (Distributed Control System) without requiring personnel to enter the hazardous area for routine parameter checks.

In metals and mining applications, the drive’s common DC bus architecture enables coordinated control of conveyor, hoist, and crusher drives within a single drive line-up, with regenerative energy from loaded descending conveyors fed back to motoring drives — a critical energy efficiency feature in high-tonnage bulk material handling systems.

In packaging and converting production lines, the drive provides precise speed and tension control for web-handling, winding, and unwinding axes, synchronized via the SIMATIC S7 motion control program to maintain register accuracy across multi-station printing and laminating processes.

Architecture Engineering FAQ

Q1: Is the 6SE7028-0ES87-2DA1 compatible with existing SIMOVERT Masterdrives Compact Plus chassis installations?
Yes. The 6SE7028-0ES87-2DA1 is designed for the SIMOVERT Masterdrives Compact Plus platform and is mechanically and electrically compatible with existing chassis installations of the same power class. It shares the common DC bus architecture and option board slots (for CBP2, SBP encoder boards, etc.) with other modules in the Masterdrives Compact Plus range. Before installation, verify that the firmware version of the replacement CU board is compatible with your existing parameterization file to avoid configuration mismatches.

Q2: Can this drive be integrated into a PROFIBUS-DP network alongside SIMATIC S7-300/S7-400 controllers without hardware modifications?
Yes, provided the CBP2 Communication Board PROFIBUS is installed in the drive’s option slot. The CBP2 enables full PROFIBUS-DP slave functionality, allowing the drive to be addressed by the S7 controller’s DP master interface (e.g., CP 342-5 or integrated DP port on CPU 315-2 DP). The GSD file for the SIMOVERT Masterdrives must be imported into STEP 7 HW Config to define the drive’s process data telegram structure. No additional hardware modifications to the drive chassis are required.

Q3: What does the 12-Month Warranty cover, and how does ZYPLC support long-term maintenance for this drive module?
All 6SE7028-0ES87-2DA1 units supplied by ZYPLC are covered by a 12-Month Warranty against manufacturing defects and functional failures under normal operating conditions. Each unit is functionally tested prior to dispatch to verify output stage integrity, control board operation, and communication interface functionality. For long-term maintenance support, ZYPLC maintains stock of compatible Masterdrives modules and option boards to support rapid replacement in the event of field failures. Our technical team can assist with parameterization backup, firmware compatibility verification, and commissioning support. Contact us at +86 19859288691 or plc.sales@zyplc.com for availability and lead time confirmation.

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