User`s guide

Overview
UMC800 Overview
4 UMC800 Control Builder User’s Guide Release E
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Digital I/O and digital function blocks are scanned and executed every 100 milliseconds. Analog I/O and
analog function blocks are processed at a rate based on the quantity of I/O and the number of function
blocks contained in the controller.
Operator interface displays configuration
Modification and customization of the operator interface are performed using UMC800 Control Builder
software. With the software, data points can be identified (tagged) using eight character names. Once
named, these signal tags may be accessed by the operator interface using a standard set of display formats
and a predefined menu hierarchy.
Customized display access and the assignment of selected display screens to keyboard buttons may be
developed using “Control Builder” software. Selected screens such as bar graphs, trends, pushbutton
actions and overview displays will require the user to specify the individual signal tags to be represented on
the screen.
Setpoint programming
Up to four independent, setpoint-programming blocks may be configured in the controller using the
“Control Builder” software. A single program (profile) may be from 2 to 50 segments in length. Up to 70
programs are stored in the controller's memory. Each segment of the program may be a ramp or a soak
except the last step that must be a soak.
In addition to the main ramp and soak output value, a second analog value (Aux. Output) is available for
each step of the program. This output is a fixed soak value that may be used to provide a setpoint value for
a secondary control loop in the process. An example would be a ramp and soak temperature program
combined with pressure setpoints for each step of the program.
Setpoint scheduler
A suite of Setpoint Scheduler blocks may be configured for multi-setpoint control. The suite is comprised
of a Master block, Auxiliary Setpoint block, Auxiliary Event block, State Switch Block, and State Flags
block. (See Figure 46.)
The Master block supports up to 8 ramp or soak outputs operating on a common time base. It accepts one
PV for each setpoint and is shown on the Operator Interface scheduler screen. Setpoint guarantee
is
provided for the master (SPS) block setpoints with a single symmetrical value for each setpoint output. You
can assign a failsafe value for each setpoint.
The Auxiliary block supports up to 8 soak only outputs.
The Event block supports up to 16 event outputs.
A single schedule may be up to 50 segments in length and includes auxiliary block data. Up to 10
schedules may be stored in the controller’s memory.
Setpoint Schedules offer the same operating modes and digital controls as setpoint programs.
On-line editing of a running schedule is supported through dedicated operator interface displays
Variables
A variable is a named diagram item, capable of holding a single analog or digital value. The value can be
connected to function block inputs with a softwire. The value can be changed using operator interface
displays or by recipe load.