GE IC697VDD100

Description

Product Description

GE IC697VDD100 is a specialized communication module for the GE Fanuc Series 90-70 PLC system. This module, designated as a VDD (VersaMate Diagnostics and Data Highway Plus Interface), serves a dual critical function. Primarily, it acts as the primary interface card connecting the Series 90-70 PLC rack to the legacy GE Data Highway Plus (DH+) network. Secondly, it provides enhanced diagnostic capabilities for the PLC system. The core function of the GE IC697VDD100 is to translate data between the PLC’s VME backplane and the DH+ protocol, enabling the 90-70 CPU to communicate with other DH+ devices such as older GE PLCs (Series 90-30, Series Six), operator panels, and programming workstations. In an era before ubiquitous Ethernet, the IC697VDD100 was the gateway for peer-to-peer data exchange and remote programming. Its reliable operation was essential for plant-wide data integration.

Product Parameters / Technical Specifications

• Manufacturer: GE Fanuc (now part of Emerson)
• Series: Series 90-70 PLC System
• Functional Designation: Data Highway Plus (DH+) Communication & Diagnostic Module
• Communication Protocol: Data Highway Plus (DH+), a token-passing network at 57.6 kbps, 115.2 kbps, or 230.4 kbps.
• Network Interface: Single DH+ port (typically a round, 9-pin “D-shell” connector).
• Bus Interface: Plugs into the VME backplane of the Series 90-70 rack.
• Node Address: Configured via DIP switches on the module to set a unique DH+ node address (0-77 octal).
• Diagnostic Features: Provided extensive status LEDs for module health, network activity, and errors. Offered more detailed diagnostics than standard communication modules.
• Compatibility: Designed for use with Series 90-70 CPUs (e.g., IC697CPU7xx) and specific VME chassis.

Advantages and Key Features

• Legacy Network Integration: Provided a seamless and reliable bridge between the powerful Series 90-70 platform and the widely installed base of GE DH+ equipment, protecting investments in existing infrastructure.
• Peer-to-Peer Messaging: Enabled deterministic data exchange between multiple PLCs on the DH+ network for coordinated control across a factory.
• Remote Programming & Monitoring: Allowed engineers to program, troubleshoot, and monitor the 90-70 CPU from a workstation anywhere on the DH+ network.
• Enhanced Diagnostics: The “Diagnostic” aspect of the VDD provided more detailed visual and software-accessible status information, aiding in the rapid resolution of network or module issues.
• Proven Reliability: As a critical link in many industrial networks, these modules were built for 24/7 operation in demanding environments.

Application Cases in Industry

• Plant-Wide Automation Integration (1990s-2000s): Used as the communication backbone in automotive, food & beverage, and chemical plants to connect multiple GE PLCs (Series 90-70, 90-30) on a single DH+ network for supervisory control and data acquisition.
• Legacy System Modernization: Served as the key component when a new Series 90-70 controller was added to an existing DH+ based control system, allowing the new powerful PLC to communicate with older ones.
• Centralized Operator Interface Networks: Connected Series 90-70 PLCs to central GE Cimplicity or Intellution HMI stations via the DH+ network.
• Data Collection and Historian Connectivity: Fed process data from the 90-70 to DH+-connected data historians.

Comparison with Competing Products

Selection Suggestions and Precautions

1. Confirm Absolute Necessity: Only select the GE IC697VDD100 if you are maintaining or repairing an existing DH+ network. It is not suitable for new systems. Consider a gateway solution (DH+ to Ethernet) as a long-term migration strategy.
2. Verify DIP Switch Settings: Before installation, configure the module’s DIP switches to a unique node address (in octal) that is not used by any other device on the DH+ network. Duplicate addresses will cause network failures.
3. DH+ Network Rules: Adhere to DH+ design rules: correct termination (resistors at both ends of the trunk), proper cable type (Belden 9463), and a maximum cable length of 10,000 feet. Violating these will cause erratic communication.
4. Firmware and Software Compatibility: Ensure you have the correct programming software (Proficy Machine Edition, Logicmaster 90) with DH+ drivers configured. The host CPU’s firmware should also be compatible.
5. Legacy Spare Part Sourcing: Due to its age, source the IC697VDD100 from reputable industrial automation surplus specialists who can test the module’s functionality. Be prepared for limited availability.
6. Plan for Obsolescence: Develop a migration plan to eventually move critical control data off the DH+ network onto a modern, supported industrial Ethernet network.

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