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The micro-sized RESPONDER SLCSee combines closed-loop control functionality with remote telemetry and control for industrial automation systems. A single P.I.D. (Proportional-Integral-Derivative) routine monitors it's process variable (AI) and automatically adjusts the setpoint output (or optionally, a modulated digital output), to automatically control a process without overshoot or hunting.
A RS-232 interface provides for optional communications to a Master via dedicated, public (dial-up) telephone, or radio channel. Four of the eight status inputs may be configured for low speed pulse accumulation. P.I.D. loop "tuning" constants are transmitted by the Master via industry standard protocols (ie Modbus, IEC 870-5, etc.). The unit's firmware is tailored by ADC per requirements to provide protocol support and any other real-time routines.
P.I.D. Loop Input/Output: 1AI 1AO
Auxiliary Input/Output: 8DI 2AI 4DO
The figure above illustrates how RESPONDER SLCs can be implemented for plant control applications. RESPONDER SLCs do not have integral displays for viewing and altering the process and/or P.I.D. variables, but rather depends upon an upstream host computer to provide for user interface and configuration functions. Third-party graphical display software generally provides enhanced flexibility with regard to how the plant information is displayed and controlled by the system operators. For example, the relationship between each loop's process and setpoint variable, might best be presented in a graphical (LED segment) form instead of the usual digit displays found on conventional controllers. This approach also permits operators who are geographically separated from the location of the SLCs to monitor and control the system.
The SLCs do not require the presence of a host computer in order to perform it's internal P.I.D. functionality. RESPONDER SLCs can be procured individually, or as part of an integrated system.
Operating environment (electronics)
Digital inputs ("status"), common mode
Optional (soft) pulse inputs
Analog inputs (A/D conversion)
Analog output (P.I.D. equate, D/A conversion)
Primary control outputs
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200122: RESPONDER SLC CARD
This assembly is provided in the following versions (XXX designation of part number).
OPTIONAL LINE DRIVER CHIPS. These components replace the standard RS-232 line driver I.C. (socketed DIP).
200127-001, RS-485 $24
200127-002, RS-422 $24
Contact representative for more information and pricing on integrated systems.
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