PLC Chapter 13

An engineering phase in which preliminary expectiations of the control system design are defined

refers to a PLC having a non-modular housing, with integrated input/output points

arrangement strategy for the placement and interconnection of the various control system elements

control strategy in which two or more PLCs work together to perfrom the complete control task

rugged portable programming device, typically a vender-specific or PC based device, having specific key functionality

area where process sensor (input) and actuator (output) devices are in close proximity to one another

category of controllers having up to 2048 I/O points, digital I/O analog I/O, and capability

control strategy in which a single controller governs the functions of an entire machine or process

a sub-category of the low-end PLC class, containing controllers having 64 or fewer I/O.

control system strategy involving a segregated machine or process, having little or no need to communicatge with other systems

refers to PLCs having digital I/O capabilities and basic instructions for timing, counting, and logic sequencing

category of controllers having up to 256 I/O, limited analog capabilities.

device that coordinates the functions of multiple PLCs, each of which controls a different machine

calculator-styled device used for inputting, monitoring, and modigying programs for low-end PLCs

PLC category having up to 4096 I/O, enhanced data manipulation and program processing capability

local availability and accessibility of technical assistance, and spare parts, after the initial purchase

decision to use only one or certain product brans, in order to reduce cost and enhance support

level of plant control hierarchy, at which several controllers are coordinated by a higher level device

a peripheral device typically used for monitoring and modifying limited areas of the PLC memory

Short publications outlining instructions or examples code for solving a particular problem