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intelligent module required to attach a PLC to a local area network
network interface module
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module used to establish point-to-point connection for data exchange between the PLC and other intelligent devices, such as computers, process control systems, operator stations, or other PLCs
serial communication module
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accepts a very fast input pulses that are unable to be detected by standard digital input modules
high-speed counter module
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a module that performs a special control function, or signal pre-processing function, r some other computing or communications task, independent of the CPU
intelligent I/O
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in a process, the actual process parameter that must be maintained at a desired setpoint
prcess variable
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a private communications system designed to allow peer-to-peer communications among PLCs of a specific brand or model
proprietary LAN
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typically used to handle text commands and transfers between the PLC and devices such as bar code readers, weigh scales, data terminals, message displays and printers
ASCII module
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augments the PLCs programming language, and runs user-written programs independent of the CPU
basic module
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performs high-speed monitoring, logic processing, and digital I/O control, independent of the CPU
I/O logic processor mdule
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serial communications module that allows the PLC to make configuration changes and receive status information from the connected process loop controllers
loop management module
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performs closed-loop control action, required to maintain process variables such as flow, speed, and level at a desired setpoint
PID module
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intelligent module that places general computing capability inside of the PLCs rack
PC-AT module
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independently cntrls multiple two-position (Heat-off) r three-position (heat-off-cool) control loops
temperature controller module
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position measuring device that generates a position value based on the distance moved away from a home or reference position. If power is lost, the system must restart at home position
incremental encoders
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controls the wall thickness of a molten plastic tube in blow molding applications
parison control module
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outputs synthesized speech, based on a stored vocabulary of messages end alarms
voice output module
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module that, under program control, output a stream f pulses intended to determine the speed and rotation of a particular type of motor
stepper positioning module
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position decoding device that outputs a unique position value based on the actual position
absolute encoder
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uses speed and position feedback to provide rapid closed-loop axis positioning involving servo drives
servo positioning module
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camera inspection and image analysis technology to make decisions about a product or region
vision input module
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module that accepts numerical data from both absolute and incremental position feedback devices
encoder input module
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