Description
ABB CPM810
- Technical Specifications:
- CPU: 32-bit RISC processor with real-time deterministic execution
- Memory: Typically 512 MB DRAM (program + data), 2–4 GB Flash (OS + project archive + logs)
- Cycle Time: Configurable, down to <10 ms for fast tasks (depends on program size)
- I/O Capacity: Supports multiple local/remote I/O racks — typical max 64 DI/DO, 32 AI/AO per base config (expandable with I/O modules)
- Communication Ports: Ethernet 10/100/1000 Mbps (for 800xA / OPC), RS-232/485 (Modbus RTU/ASCII), optional Profibus DP (via add-on CI module)
- Redundancy: Supports hot-standby pair with automatic switchover (watchdog, sync link)
- Power Requirement: 24 V DC (18–30 V DC), typical 15 W, max ~20 W
- Operating Temp.: 0 °C to +60 °C
- Mounting: Rack slot or DIN rail with carrier; dimensions ≈106 × 160 × 44 mm
- Diagnostics: LEDs for Run, Error, Comm, I/O Healthy; event buffer with timestamp
- Functional Features:
- Executes IEC 61131-3compliant control strategies (in 800xA Engineering Workbench)
- Online download of minor program changes without stopping process (qualified changes)
- Integrated SOE (Sequence of Events) with 1 ms resolution for trip analysis (turbine apps)
- Time synchronization via NTP/SNTP or IRIG-B
- Extensive self-diagnostics, battery-backed RTC (supercap or coin cell depending on variant)
- Application Scenarios:
- Turbine control & protection (steam/gas) — TP800 with CPM810 as governor/protector CPU
- Process unit control in 800xA DCS compact configuration
- Retrofit of legacy Advant Controller 450 nodes with modern CPU while keeping I/O
- Boiler/BOP (Balance of Plant) control in power generation
- Material & Structure:
- Housing: Aluminum/steel shielded module with plastic front bezel
- Connectors: Backplane gold-finger edge connector + front serial/Ethernet RJ45 + DB9
- Cooling: Convection via chassis; some versions have small internal fan in rack
- Working Principle:
At power-up the boot loader initializes hardware, loads the operating system and control application from Flash into RAM. The executive enters a cyclic scan: read inputs from I/O image table → execute control logic → write outputs → handle communication tasks → update diagnostics. In redundant configuration, the standby CPU mirrors the active’s image table via a high-speed sync link and takes over within one scan on failure detection.
- Installation Requirements:
- Insert into designated CPU slot of Advant/800xA rack ensuring backplane engagement
- Connect 24 V DC supply to rack PSU — verify polarity and voltage before power-on
- For redundancy: connect sync cable between two CPM810 modules per ABB wiring diagram
- Download application via Control Builder / 800xA Engineering
- Precautions:
- Always discharge static before handling — use wrist strap
- Do NOT remove module while rack is powered unless hot-swap is explicitly supported in your configuration
- Battery (if equipped) must be replaced per maintenance schedule — loss of battery with power off clears retentive variables and RTC drifts
- Firmware version must be compatible with Engineering Workbench version — mismatch prevents download
