Rockwell Automation Publication ICSTT-RM448M-EN-P - February 2021 143
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 software.
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.
P
peer to peer A Peer to Peer network consists of one or more Ethernet networks connecting
together a series of AADvance and/or Trusted® controllers to enable
application data to be passed between them.
pinging In MODBUS communications, sending the diagnostic Query Data command
over a link and by receiving a reply ensuring that the link is healthy and the
controller is able to communicate with the master. No process data is
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