Pseudo Redundant I/O Module Operation for Instrumentation Systems
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Solution Overview
Problem
The availability and maintainability of instrumentation systems with multipoint type I/O modules in non-redundant configurations are compromised due to the need for immediate replacement upon failure, leading to potential system downtime and increased maintenance challenges.
Innovation Solution
The system allows for the operation of a non-redundant I/O module in a pseudo redundant configuration, enabling seamless transition to a redundant state by attaching a new I/O module and transferring control rights, thereby maintaining system availability and reducing maintenance complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multipoint type I/O modules in non-redundant configuration are used, then installation location and manufacturing cost are reduced, but availability and maintainability decrease due to immediate replacement requirement upon failure
Solution Approach 1:
The system dynamically changes the operational state of I/O modules from single configuration to redundant configuration upon detecting a failure. The controller automatically transitions from using a single I/O module to using multiple I/O modules in redundant configuration, allowing the system to adapt its structure based on operational conditions rather than being fixed in advance
Solution Approach 2:
The system prepares backup I/O modules in advance that can immediately take over when a failure occurs. The redundant I/O modules are pre-configured and stand by ready to assume control, eliminating the need for immediate replacement and allowing maintenance to be performed without system downtime
2Device complexity
If multipoint type I/O modules in non-redundant configuration are used, then device complexity is reduced, but maintainability worsens due to prior work requirements and control loop stopping
Solution Approach 1:
The system dynamically adjusts its configuration complexity based on operational needs. During normal operation, it uses a simple single I/O module configuration. Upon failure, it dynamically transitions to a redundant configuration, and during maintenance, it automatically manages the transition back to single configuration, eliminating the need for manual prior work and control loop stopping
Solution Approach 2:
The system performs self-service by automatically detecting failures, switching to redundant I/O modules, and managing the replacement process without requiring operator intervention. The controller automatically stops and restarts control loops as needed, and can autonomously determine when to transition between single and redundant configurations, making maintenance simpler and faster
Data Source
AI summary
An instrumentation system according to one embodiment of the present invention includes a plurality of field devices, in which each of the field devices is configured to perform at least one of measuring and operation of a target, a connection device including a plurality of slots, in which I/O modules are respectively attachable to the slots and the field devices are connectable to the I/O module, and a host control device configured to individually set the I/O modules attached to the slots to have a redundant configuration or a non-redundant configuration and to operate a first I/O module having the non-redundant configuration, among the I/O modules attached to the slots, in a pseudo redundant configuration.