Instruction Manual

Instruction Manual
D103434X012
Introduction and Specifications
November 2014
4
D Resource Block—The resource block contains the hardware specific characteristics associated with a device; it has
no input or output parameters. The resource block monitors and controls the general operation of other blocks
within the device. For example, when the mode of the resource block is Out of Service, it impacts all function
blocks.
D Transducer Blocks—The transducer block takes an analog signal and converts it to a level or interface reading. The
DLC3020f has two transducer blocks, one for the device, and one for the display.
Function Blocks
In addition to the resource and transducer block, the digital level controller contains the following function blocks. For
additional information on function blocks, refer to the Parameter section.
D Analog Input (AI) Function Block—The analog input function block monitors the signal from a DLC3020f sensor and
makes the level or interface available to another block.
D Proportional‐Integral‐Derivative (PID) Function Block—The PID function block performs
proportional‐plus‐integral‐plus‐derivative control.
D Discrete Input (DI) Function Block (2) —The discrete input function block processes a single discrete input from a
DLC3020f and makes it available to other function blocks. In the digital level controller, the DI function block can
provide a user defined on/off switch indication.
D Analog Output (AO) Function Block (3) —The analog output function block accepts the output from another
function block and transfers it to the transducer block to use, for example, for process temperature compensation
or direct density readings.
D Input Selector (ISEL) Function block—The input selector function block selects from up to four inputs and may
provide the selected signal as input to the PID block. The input selection can be configured to select the first good
input signal; a maximum, minimum or average value; or a hot spare.
D Arithmetic (ARTH) Function Block—The arithmetic function block is used to calculate an output value that is based
on the value of IN and the auxiliary inputs, if used. IN_LO is used if an extended range flow measurement is required
from a differential pressure flow meter, like an orifice plate or venturi. Each of IN_1, IN_2 and IN_3 may be adjusted
by a bias and a gain, and then used as terms in an equation selected by the parameter ARITH_TYPE.
Using This Manual
This manual describes using AMS Device Manager to calibrate and configure the DLC3020f as well as information on
using the Field Communicator.
Navigation paths for Configuration and Calibration procedures are included for both AMS Device Manager and the
Field Communicator.
For example, to access Guided Calibrations:
AMS Device Manager Configure > Calibrate > Guided Calibrations
Field Communicator Configure > Calibrate > Full Calibration (Bench) or Full Calibration (Field)
Field Communicator menu structures for the function blocks and the resource and transducer blocks are included in
the Blocks section.
Throughout this document, parameters are typically referred to by their common name or label, followed by the
parameter name and index number; for example, Write Priority (WRITE_PRI [39]). However, not all interface systems
support the use of the parameter label and instead use only the Parameter Name, followed by the index number, when
referring to the block parameters.