Rockwell Automation Publication ICSTT-RM406J-EN-P - February 2021 89
low demand mode Where the Safety Instrumented Function only performs its designed function
on demand, and the frequency of demands is no greater than one per year.
M
manual call point A component of a fire detection and fire alarm system which is used for the
manual initiation of an alarm.
MODBUS An industry standard communications protocol developed by Modicon. Used
to communicate with external devices such as distributed control systems or
operator interfaces.
MODBUS object Represents the configuration settings for a MODBUS Master or for its
associated slave links in the AADvance Workbench software or AADvance-
Trusted SIS Workstation software. The settings include communication
settings and messages.
module locking screw The AADvance latch mechanism seen on the front panel of each module and
operated by a broad, flat-blade screwdriver. Uses a cam action to lock to the
processor base unit or I/O base unit.
N
NFPA 85 The Boiler and Combustion Systems Hazards Code. Applies to certain boilers,
stokers, fuel systems, and steam generators. The purpose of this code is to
contribute to operating safety and to help prevent uncontrolled fires,
explosions and implosions.
NFPA 86 A standard for Ovens and Furnaces. Provides the requirements for the
prevention of fire and explosion hazards in associated with heat processing of
materials in ovens, furnaces and related equipment.
O
on-line The state of a controller that is executing the application.
OPC A series of standards specifications which support open connectivity in
industrial automation.
output (variable) A value passed from the processor module to an I/O module.
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