GE Fanuc IC697MEM717 Memory Module 512 KB

IC697MEM717 Memory Expansion Module

Product Introduction

The GE Fanuc IC697MEM717 is a dedicated memory expansion module designed for the Series 90-70 programmable logic controllers. This compact board supplements the existing memory on the baseboard, effectively increasing the available storage for user programs and critical data. It serves primarily to expand the PCM memory retained by the battery on the CPU or PCM, without requiring an additional slot in the rack. Consequently, this solution offers a cost-effective way to enhance system capability without altering the physical configuration.

This module comes in multiple capacity variants, specifically 64, 128, 256, and 512 Kbytes. Such flexibility allows engineers to select the appropriate size based on application complexity. For instance, a simple machine control program may only need 64 KB, while a complex process with extensive data logging benefits from the full 512 KB option. The IC697MEM717 installs directly onto the host module as a daughterboard, sharing the same slot and backplane connection. This design minimizes space usage while maximizing functional expansion.

Memory Retention and Battery Backup

One of the standout features of the GE Fanuc IC697MEM717 is its robust memory retention capability. The module relies on a battery located on the baseboard housing to preserve stored content during power outages. Under nominal conditions, this battery sustains the memory for up to six months without applied power. This duration provides ample time for maintenance or scheduled shutdowns without losing critical program logic or configuration data.

Additionally, the calendar clock continues to run accurately while the battery is active, ensuring time-stamped events remain reliable even after extended power-down periods. The shelf life of the IC697MEM717 is rated at 10 years when stored at an optimal ambient temperature of 20°C (68°F). This longevity makes it suitable for long-term inventory management and spares provisioning. Therefore, users can confidently stock this module for future upgrades or emergency replacements.

Error Checking and Data Integrity

Reliability forms the cornerstone of the IC697MEM717 design. The logic program memory undergoes continuous error checking performed by the PLC CPU as a background task. This verification process runs persistently, even during power cycling, hard resets, and soft resets. Such vigilant monitoring ensures that stored data remains uncorrupted, thereby preventing unexpected machine behavior or process deviations.

Moreover, the PCM memory error checking operates independently of user intervention. It actively scans memory locations for bit errors and flags anomalies without slowing down the primary control loop. This feature is particularly valuable in safety-critical applications where data integrity directly impacts operational safety. Consequently, the GE Fanuc IC697MEM717 contributes to overall system dependability by maintaining clean and error-free memory.

Installation and Configuration Guidelines

Proper installation of the IC697MEM717 requires careful attention to procedure. For CPU installations, technicians must first clear the existing memory using either Windows-based programming software or MS-DOS utilities. This step prevents conflicts between old and new memory allocations. Once cleared, the module attaches to the designated daughterboard connector on the CPU or PCM board. Ensure that the pins align correctly and that the board is firmly seated to establish reliable electrical contact.

For PCM installations, follow the specific instructions provided with the programmable coprocessor module. These guidelines may differ slightly due to variations in PCM hardware revisions. Additionally, verify that the selected memory capacity matches the CPU or PCM's supported range. The IC697MEM717 does not require any extra slot configuration for data and program storage, simplifying the integration process. After installation, perform a comprehensive memory test using diagnostic tools to confirm proper functionality.

Compatibility and Application Scope

The GE Fanuc IC697MEM717 is explicitly designed to expand memory for GE 772 and 771 CPUs within the Series 90-70 family. It also supports PCM modules that utilize battery-backed memory for data retention. This compatibility makes it a versatile upgrade option for existing installations seeking additional storage without replacing the entire controller. Common applications include large ladder logic programs, extensive data tables, recipe management systems, and historical data logging.

Because it installs as a daughterboard, the IC697MEM717 does not consume extra rack slots, preserving space for I/O or communication modules. This efficient use of resources appeals to system integrators and plant engineers alike. Furthermore, the module's ability to supplement baseboard memory allows for incremental capacity increases, aligning with evolving operational demands.

Packaging List

Each GE Fanuc IC697MEM717 unit ships with the following items:

• One IC697MEM717 memory expansion module

• One anti-static protective bag

• One installation quick-reference card

Please note that the baseboard battery and programming cables are not included. All shipments use Fedex, UPS, or DHL to ensure safe and timely delivery worldwide.

Frequently Asked Questions

1. Which CPUs support the IC697MEM717 module?
This memory module is compatible with GE 772 and 771 CPUs in the Series 90-70 family. It also works with certain PCM modules that accept daughterboard expansion.

2. How do I clear memory before installing this module?
Use Windows-based programming software or MS-DOS utilities to clear the existing memory. This step prevents data conflicts and ensures proper initialization.

3. Does the IC697MEM717 require its own slot in the rack?
No, it installs as a daughterboard directly onto the host CPU or PCM module, sharing the same slot. This design saves rack space for other modules.

4. What happens if the backup battery fails?
If the battery depletes, the module loses all stored data. We recommend replacing the baseboard battery every 2–3 years to maintain the six-month retention period.

5. Can I mix different capacity modules in the same system?
Each CPU or PCM supports only one memory expansion module. Choose the capacity that best fits your program size before installation, as you cannot combine multiple modules.