This section details the requirements and restrictions for the HC900 Hybrid controller./UMC800 application.
Set point profile and recipe slots
The server The computer on which the Experion database software and server utilities run. See also: Experion server TPS. database allows you to configure and store up to 1,000 SP The setpoint parameter of an analog point. The desired value of a process variable. Setpoint (SP) is an analog pointparameter, and the value is entered by the operator. The setpoint can be changed any number of times during a single process. The setpoint is represented in engineering units. See SP in the Control Builder Parameter Reference. See also: analog point, parameter, process variable. profiles. These profiles can be downloaded to HC900 and UMC800 SP programmers in the same manner as profiles stored locally in the controller Also known as remote terminal unit, RTU. A generic term for a device that is used to control and monitor one or more processes in field equipment. The most common control and monitoring device in an access control and security system is an access control panel. Other devices include security monitoring panels, elevator controllers, and fire monitoring devices. Controllers include programmable logic controllers (PLCs), loop controllers, bar code readers, and scientific analyzers. See also: C200 controller, control processor, CPM, hybrid controller, network node controller, PLC..
The system overwrites Profiles 1 to 4 in the HC900's and the UMC800's own pool of stored profiles. Apart from these four profiles, it is possible, although strongly not recommended, to use the remaining profile slots internal to the controller in parallel with the 1,000 server database profiles.
The server database also allows you to configure and store up to 1,000 recipes. These recipes can then be downloaded to HC900 and UMC800 controllers in the same manner as recipes stored locally in the controller.
The system overwrites Recipe 1 in the HC900's and the UMC800's own pool of stored recipes. Apart from this recipe, it is possible, although strongly not recommended, to use the remaining recipe slots in parallel with the 1,000 server database recipes.
Set point program history
The history of an SP program can be viewed on a standard trend A display in which changes in value over time of one or more point parameters are presented in a graphical manner. See also: display, point parameter. and compared to its ideal pre-plotted profile. To collect history, a point needs to be built for each programmer in an HC900 and a UMC800 controller. These points are used to monitor the primary 1. For Regulatory Control blocks in a cascade strategy: A primary is an upstream block from which an initializable input is fetched. A block has one primary for each initializable input. See also: block. 2. The controller (or chassis) that is currently controlling the redundant process by carrying out the assigned functions. Compare: secondary. See also: assigned function, chassis, controller redundancy. and auxiliary PV The process variable. An actual value in a process. In the case of an analog point, for example, the PV represents values such as temperature, flow, and pressure. A PV may also be sourced from another parameter or be calculated from two or more measured or calculated variables using a point algorithm. See also: analog point, parameter, point algorithm, PV algorithm, PV clamp, PV period. outputs of the processes driven by the programmers, collecting the values and storing them in history.
Note that only the first four programmers in an HC900 can be monitored. This means that a maximum of four points, one for each programmer, are required for each HC900 and UMC800 controller in the system.
Display locking
For safety reasons and data integrity, recipes and SP programmers can only be configured and maintained by one user at a time. Any users who try to access these displays while they are in use are locked out. A message indicating the lockout is displayed, indicating the Station Experion's main operator interface. Station presents information using a series of displays. See also: display. number that is currently using the display. These displays remain locked until the Station either exits the displays or is disconnected.