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Help CenterABB DSPC172H DSP Master Control CPU Module
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I. Functions and Advantages
1. Core Functions
High-Performance DSP Real-Time Computing: Dedicated digital signal processor architecture supports multi-task priority scheduling, and can execute high-speed PLC logic and DCS process regulation algorithms in parallel. The cycle scan time is adjustable to meet millisecond-level closed-loop control and complex process interlocking.
Multi-Protocol Communication and Bus Expansion: Onboard Ethernet for communication between engineering station/operator station and system networking. Supports PROFIBUS DP, RS-485/RS-232 serial links. Redundant communication interfaces can be extended for seamless connection with remote I/O, inverters and intelligent instruments.
System Redundancy and Fault Tolerance: Supports active-standby CPU hot redundancy with millisecond-level bumpless switchover upon failure. Critical data is stored in duplicate. Battery-backed SRAM retains programs and historical data for a long time after power failure, with low battery warning.
Comprehensive Diagnosis and Security Mechanism: Built-in hardware self-test and channel-level fault detection. Supports authority classification and program locking to prevent unauthorized modification of configuration or firmware. Front-panel indicators and diagnostic interface enable quick location of system, communication and module faults.
Modular I/O Expansion: Compatible with Advant Master series local and remote I/O racks. Supports mixed connection of analog (AI/AO), digital (DI/DO) and pulse modules to meet large-scale control systems with thousands of I/O points.
2. Key Advantages
Industrial-Grade High Reliability: Wide-temperature design (operating -25℃～+65℃), anti-electromagnetic interference compliant with IEC 61000 standards, dustproof and moisture-proof, suitable for high-temperature, dusty and high-interference environments such as metallurgy and power plants.
Seamless Ecosystem Integration: Compatible with ABB Advant OCS software, supports IEC 61131-3 standard programming languages, unified engineering configuration to reduce cross-platform integration costs; enables data exchange with Freelance systems.
Convenient Maintenance: Supports online program download and firmware upgrade. Modular card design with rail/rack mounting; hot-swappable under redundant architecture without full system shutdown. Fault logs are automatically saved for traceability and analysis.
Flexible Expansion: Smooth scaling of hardware and software licenses from small standalone systems to redundant distributed large DCS without changing the core architecture.
II. Technical Specifications
1. Core Performance and Memory
| Parameter | Value |
|---|---|
| Model | DSPC172H (57310001-MP) |
| Processor | Dedicated high-performance DSP |
| Memory Configuration | Large-capacity Flash (program storage) + SRAM (data buffer, battery-backed) |
| Task Scheduling | 8 cyclic/priority tasks + 1 high-speed PLC task |
| Redundancy | Active-standby CPU hot redundancy, switchover time |
2. Communication and I/O
| Parameter | Value |
|---|---|
| Ethernet | 10/100 Mbit/s RJ45, TCP/IP, UDP |
| Serial Ports | RS-232 (diagnosis), RS-485 (Modbus RTU) |
| Fieldbus | PROFIBUS DP V0/V1 (master/slave selectable, 9.6 kbit/s~12 Mbit/s) |
| I/O Expansion | Compatible with Advant Master I/O racks, up to thousands of I/O points |
3. Electrical and Environmental
| Parameter | Value |
|---|---|
| Operating Voltage | 24 V DC (19.2~30 V DC, rack-powered) |
| Power Consumption | Typical |
| Operating Temperature | -25℃～+65℃ |
| Storage Temperature | -40℃～+85℃ |
| Relative Humidity | 5%～95% (non-condensing) |
| Protection Degree | IP20 (card only; must be installed in IP54 or higher cabinet) |
| Mounting | Advant Master standard rack mounting |
| Dimensions | Approx. 241×254×63.5 mm |
| Weight | Approx. 0.95 kg |
III. Application Areas
Power Industry: Coordinated control (CCS) of boiler/turbine/generator in thermal power plants, substation automation, pump and fan group control.
Metallurgy Industry: Rolling mill production lines, blast furnace/converter control systems, continuous casting and rolling process regulation.
Chemical/Petrochemical: Three-element control of temperature/pressure/level for large reactors, rectification towers, pipeline transportation systems.
Paper/Water Treatment: Whole-process control of pulping and papermaking, process interlocking of water supply and sewage treatment plants.
Cement/Building Materials: Cement kiln calcination control, waste heat power generation systems.
IV. Installation and Commissioning Guide
Pre-Installation Preparation
Verify model (DSPC172H 57310001-MP) and compatibility with Advant Master rack and system software version.
Control cabinet protection degree ≥ IP54, away from strong interference sources such as inverters and high-power motors.
Prepare anti-static wristband, screwdriver, multimeter, communication cables, battery backup unit. Disconnect power and wait for capacitors to discharge (≥10 minutes).
Hardware Installation
Insert the card steadily into the rack slot and fasten screws to ensure reliable backplane bus connection.
Power wiring: correct polarity of 24 V DC, with 1 A fuse.
Communication wiring: Ethernet to engineering station, PROFIBUS DP to remote I/O, shield grounded at one end.
Grounding: module grounding terminal connected to cabinet protective earth, grounding resistance ≤4 Ω.
Software Configuration
Open ABB Advant OCS/Control Builder, create new project, add DSPC172H module.
Configure CPU parameters, task cycle, communication address, redundancy mode.
Write control programs (LD/FBD/ST) and configure I/O channel mapping.
Download and lock program to prevent unauthorized modification.
Commissioning and Verification
Power-on test: power LED steady on, run LED flashing, no fault alarms.
Communication test: ping CPU IP to confirm normal communication with host computer and I/O modules.
Redundancy test: manually switch active/standby CPU to verify no data loss and bumpless control.
Function test: simulate load and faults to verify normal control logic and protection functions.
V. Common Problems and Solutions
CPU fails to start / no display: Check power voltage, fuse, backplane connection; troubleshoot hardware fault, replace CPU card if necessary.
Communication interruption: Check IP address/baud rate/protocol parameters; confirm communication cable shield grounding; verify bus terminating resistor.
Redundancy switchover failure: Check redundancy configuration, standby CPU status and synchronization link.
Program download failure: Check authority level, confirm CPU is unlocked, verify software and firmware version match.
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