Murphy CE-05171N manual Glossary, Terminal Emulator

8.0 Glossary

Analog Input	Terminals A18 to A29 are analog inputs on the C3-1 Centurion main I/O module. Accepts
	voltage signals within the range of (0 to 5) VDC or (4 to 20) mA and are compared to con-
	troller set points or events.
Boot loader	Means by which the Centurion controller communicates with C3-3 Display and MConfigPro
	to receive and transfer new or updated configurations and firmware; and ensure data and
	configuration synchronization.

Controller Set points User defines normal operating range for the controller to optimize the equipment. Set points can also define some other threshold, exception or event that may require action. Multiple set points are often applied to a process and they may be manipulated as needed to meet changing conditions.

Dead band	The user set range at which input may fluctuate without the controller taking any action.
	The range may be fixed or variable.
Digital Input	Terminals 30 to 61 are the digital input channels. User selects whether digital input is nor-
	mally open (N/O), or normally closed (N/C). Users may also associate these inputs with
	transition times for indicating no-flow conditions on divider blocks.
Event	Defines the action required by the controller in response to any number of parameters.
	Event actions range from simple alarm message to emergency shutdown (ESD).
Magnetic Pick Up	Terminals 64 to 65 are for magnetic pick up.
Maximum	Maximum of engineering applied scale to the Offset and Span.
Minimum	Minimum of engineering applied scale to the Offset and Span.
No-Flow	Designed to protect against compressor or engine failures, the controller monitors the cycle
	time of lubrication system cycles and if that cycle time falls under a user assigned value, the
	controller will activate a defined associated action.
Offset	User defined value to correct for known variance in the raw data.
Panel Ready	In States, the first logical step in start up.
Permissive	A process condition, (Digital Input or Analog Set point), that must be met in order for the
	engine to start.
Signal	An electrical quantity of voltage or current that is used to represent or signify some other
	physical quantity.
Span	The difference between the full scale output and the offset as raw data.
Start Delay	A time delay function to prevent premature start up.
State	Predefined parameter of logical steps needed to successfully start and maintain an engine.
Terminal Emulator	Allows a user to modify the firmware to allow upload or download of a record to either the C3-3
	display or the controller. Always download a configuration after a firmware change.
Thermocouple	A device for measuring temperature consisting of two dissimilar metals of high purity for an
	accurate temperature/voltage relationship. User defines whether the calibration is J or K.
	Terminals 1 to 17 are for thermocouple inputs.

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