GE-IC698CRE040 PACSystems RX7i Hot‑Standby Redundant CPU Module

Description

Core performance features

‑ Processor: 1.8 GHz Intel Pentium‑M microprocessor. Boolean execution speed: 0.02391 ms per 1000 contacts‑coils, good at floating‑point calculation for complex process regulation. ‑ Memory: 64 MB battery‑backed SRAM for user logic and real‑time runtime data; 64 MB flash memory for program, hardware configuration, symbolic tags and time‑stamped SOE event logs. On‑board replaceable lithium battery preserves SRAM data and real‑time clock during power loss. ‑ I/O capacity: maximum 32768 discrete I/O bits; up to 32768 analog I/O words. Supports maximum 512 program blocks, each block up to 128 KB. ‑ Communication interfaces:  Dual independent 10/100 Mbps auto‑negotiation RJ45 Ethernet ports. Supported protocols: SRTP, Modbus TCP, IEC 60870‑5‑104, EGD. Built‑in web server and FTP service, supporting total 16 concurrent web / FTP client connections for remote monitoring and file access. Redundant IP function is available for network‑level fault tolerance.  Three serial ports: RS232 debug port, RS485 port, station‑manager RS232 port. Supports Modbus‑RTU slave, SNP and serial I/O protocols. Firmware upgrade can be completed via serial or Ethernet channel. ‑ Redundancy architecture: supports hot‑standby HSB redundancy. Two CRE040 CPUs keep logic and data synchronized through RMX016 module. When primary CPU fails, secondary unit takes over control without stopping field production. ‑ Programming standard: compliant with IEC 61131‑3. Supported languages: Ladder Diagram, Function Block Diagram, Structured Text, embedded C for custom advanced algorithms. Supports online modification without stopping CPU running. ‑ Self‑diagnosis function: comprehensive hardware health monitoring for CPU core, memory, backup‑battery voltage, VME‑bus status. Time‑stamped fault logs and SOE records are stored. Low‑battery alarm bit will trigger before onboard lithium battery fails. ‑ Power consumption: draws 6.8 A @ 5 VDC from VME backplane; no separate external power‑supply terminals. ‑ Environmental parameters: operating temperature 0‑60 ℃; storage temperature‑40 ~ +85 ℃; humidity 5‑95 % non‑condensing; IP20 protection grade, cabinet‑only installation. ‑ Compatibility note: CRE series is redundancy‑enabled variant of CPE040. CRE040 and CPE040 are not fully interchangeable for redundant projects. Firmware revision must match RMX016 and other VME boards in chassis.

Physical appearance

Standard 6U horizontal VME plug‑in circuit board, inserted into RX7i rack VME slot. ‑ Front metal faceplate: two RJ45 Ethernet connectors, three serial‑port interfaces; multi‑LED status indicators: CPU OK, RUN, STOP, Output‑Enable, Battery alarm, Ethernet link status, redundancy synchronization status. Metal ejector latches for convenient insertion and extraction. Part‑number label printed IC698CRE040. ‑ Rear side: large‑size VME golden‑finger contacts for rack back‑plane power supply and high‑speed VME‑bus data exchange. ‑ No independent sealed metal housing. PCB is exposed inside rack. On‑board replaceable lithium backup battery for SRAM and RTC data retention. ‑ All external communication connections are finished on front‑panel connectors, no field process signal terminals.

On‑site application scenarios

Installed inside power‑plant, petrochemical and heavy‑industry automation cabinets. As core redundant controller for PACSystems RX7i system, it executes complex continuous‑process regulation, interlock and sequence logic. In redundant configuration, primary‑standby synchronization guarantees uninterrupted control when main CPU hardware fails. Real‑time measuring data, alarm messages and SOE event records are uploaded to HMI and dispatching host via Ethernet and serial channels. If this module fails in non‑redundant single‑CPU mode, the whole rack will lose control capacity and may trigger unit protective trip. In redundant configuration, standby unit will take over control automatically. After replacement, download original project configuration, verify firmware compatibility with RMX016 and other rack boards, check VME‑bus communication status of each I/O slot, test redundancy synchronization and switch‑over function, and confirm onboard battery voltage before putting online.

Installation & operating notes

‑ Though VME hot‑swap is theoretically supported under redundant architecture, power‑off replacement is strongly recommended in actual industrial site to avoid scratch and oxidation damage to VME golden‑finger contacts. ‑ Ethernet and serial communication cables shall adopt industrial‑grade shielded twisted‑pair, keep physical separation from high‑power cables to reduce electromagnetic interference causing link instability. ‑ Pay attention to onboard backup lithium‑battery aging. When battery voltage drops below threshold, SRAM runtime data and real‑time clock will be lost after power‑off. Replace battery according to site maintenance cycle. ‑ Keep cabinet good ventilation. High ambient temperature accelerates aging of onboard chips and electrolytic components. ‑ Do not disassemble PCB for component‑level repairing. Replace whole module for permanent hardware damage.

Common field phenomena & troubleshooting

1. All front‑panel indicators stay off after rack power‑on: Check VME back‑plane 5 VDC power supply condition, re‑seat module firmly in slot. If backplane power is normal, onboard power‑circuit damage may occur.
2. Ethernet link flickering frequently: Inspect industrial shielded cable and connector crimp quality, verify IP and network parameter setting, eliminate cabinet high‑temperature and dust influence.
3. Redundancy synchronization failure: Confirm firmware version consistency between two CRE040 CPUs and RMX016 module; check sync‑link wiring; clean golden‑finger contacts.
4. Cannot download project configuration: Check Proficy Machine Edition communication path, confirm whether CPU enters fault‑lock state, verify firmware compatibility.
5. SOE / runtime data lost after power‑cycle: Replace onboard lithium backup battery, re‑download configuration and verify data‑retention function.
6. Partial VME I/O modules reported offline: Clean dust and oxidation on VME golden‑finger contacts, check back‑plane bus health, confirm whole‑rack firmware matching.