GE IS220PAICH2A I/O 28V DC power supply

Description

HMI is a Windows based operator station and engineering workstation. ToolboxST configuration and diagnostic software can also be loaded onto laptops. The HMI can serve as an independent operator station, a single engineering workstation, or a combination of both. Physically, it can be used as a commercial or industrial grade computer. It communicates through an Ethernet control network and a separate Ethernet information network for file transfer and communication with non GE factory control and monitoring systems.

Redundant HMI and Ethernet can be used to improve operational and communication reliability. However, important control and protection functions are handled by the controller rather than in the HMI to reduce the risk of device operation and availability. Similarly, high-precision timestamps of alarms, events, and SOEs are executed in the controller (for optimal resolution) and transmitted to the HMI. The controller also maintains an alarm state.

Configurable alarm report tools provide guidance for alarm analysis. An Alarm Performance Metric Report summarizes the key performance metrics and their actual values compared to their target values based on at least 30 days of data. For convenience, configuration of all metrics in the report can be instantly set to a pre-defined set of default values with a single command, or the configuration can be customized. Individual reports are available for Alarms Per Day, Alarms Per Hour, and Alarms Per 10 Minutes with any combination of the five alarm/event types.

For each report, the data may be displayed in a tabular format showing the quantity of occurrences for each alarm during the specified period of time. Also, a bar or pie chart may display the alarm quantities and the percentage of alarms above and below a threshold level. An Alarm Flood occurs when alarms are generating at a faster rate than the operator can effectively manage them. ANSI/ISA 18.2 defines an alarm flood period as more than 10 alarms occurring in a 10 minute period. The Alarm Flood report enables configuration of the number of alarms to begin a flood condition (normally > 10), to end a flood condition (normally < 5), and the time interval (normally 10 minutes). A tabular report displays the quantity of alarms during each alarm flood, the alarm/event type, the start time of the flood, and its duration.

A supporting pie chart displays the number of alarm floods and the percentage of floods allocated to each of the five alarm/events types. The Top Most Frequent Alarms report identifies which alarms occur most often with a table, a bar chart, and a pie chart report for a specified period of time. Additionally, the pie chart displays the percentage of the overall alarm load being allocated to the 10 most frequently occurring alarms.

ARM based distributed processing unit structure
The structural diagram of the ARM based distributed processing unit is shown in Figure 2, which is very similar to the structure of a general distributed processing unit. Here, the processing unit is mainly divided into six parts: ARM controller, upper network module, power management module, memory module, lower network module, and clock module. The ARM controller and storage module constitute the most basic embedded system, and the data processing and control strategy of the entire DCS control system are processed here. The upper layer network module mainly refers to the main/redundant network that communicates with the management layer and a network that implements data exchange between the main/redundant distributed processing units. The main function of this part is to complete real-time detection of the DCS control system by the management layer and achieve data redundancy of the main/redundant distributed processing units. The underlying network module is composed of two primary and secondary 485 networks, which mainly achieve data communication between the I/O cards of the ARM controller. The memory module can be divided into two parts, one for managing and storing the operating system, and the other for managing and storing real-time data. The power module and clock module respectively achieve power management and clock management.