GE IC697MEM715B CMOS Expansion Memory

The IC697MEM715 is a CMOS expansion memory manufactured by GE Automation and Controls, available in various capacities: 64 KB, 128 KB, 256 KB, and 512 KB. It is primarily used to expand data and logic memory in CPU 772/771 modules or in the programmable co-processor module, known as IC697PCM711.

Key Features and Functionality:

1. Expansion Memory Features:
   • Configurable for data and program storage.
   • Configured as a daughter board placed in the same slot as the module it operates in.
   • Supplementary to the memory of the base board.
   • Memory retention in the event of power loss is facilitated by a battery on the base board housing.
2. Memory Integrity:
   • Logic program memory undergoes error checks by the PLC CPU through a checksum routine.
   • PCM error checks storage memory automatically during power cycles, hard or soft resets.
3. Installation and Configuration:
   • No additional slot required for configuration.
   • Adjustable for storage of both program and data.
   • Field installable without the need for additional tools.
4. Software and Battery:
   • Uses MS-DOS or Windows programming for configuration.
   • Includes a lithium battery managing a calendar clock.
   • Retains user memory in case of power failure.
   • Battery shelf life is approximately 10 years, with ideal memory retention for six months.
   • Caution: The old battery should not be removed until the installation of the new battery is complete.
5. Ethernet TCP/IP and EGD (Ethernet Global Data):
   • Features the new Ethernet Global Data (EGD) for high-speed networking and coordination applications.
   • Facilitates configurable periodic exchanges among networked control nodes without requiring programming.
   • EGD is significantly more bandwidth efficient (up to 10 times) compared to the normal polling system.

The GE Emerson IC697MEM715 offers expanded memory capabilities with reliable retention, backup power through a lithium battery, and supports advanced networking solutions via Ethernet TCP/IP and EGD for efficient data exchanges among control nodes.