IS420UCSBH1A REV.H UCSB CONTROLLER MODULE

IS420UCSBH1A is a UCSB Controller Module developed by GE. UCSB controllers are self-contained computers that execute application-specific control system logic. The UCSB controller does not host any application I/O, unlike traditional controllers that do. Furthermore, all I/O networks are connected to each controller, providing it with all input data. If a controller is powered down for maintenance or repair, the hardware and software architecture ensures that no single point of application input is lost.

Operation

• The controller is pre-loaded with application-specific software. It is capable of running rungs or blocks. Minor changes to the control software can be made online without restarting the system.
• The IEEE 1588 protocol is used to synchronize the clocks of the I/O packs and controllers to within 100 microseconds via the R, S, and T IONets. External data is transferred to and from the controller’s control system database via the R, S, and T IONets. Process inputs and outputs to I/O modules are included.
• This also includes the following in a dual system:
  • The designated controller’s internal state values and initialization information
  • The status and synchronization information from both controllers
• This also includes the following in a Triple Modular Redundant (TMR) system:
  • Internal state values for voting and status, as well as synchronization information from all three controllers
  • Data from the designated controller for initialization

IS420UCSBH1A