Glossary
Appendix D
D-15
Module Addressing
A method of identifying the I/O modules installed in a chassis.
Module Group
Adjacent I/O modules which relate 16 I/O terminals to a single 16-bit
image table word.
Module Slot
A location for installing an I/O module.
Monitor
(1) A CRT display. (2) To observe an operation.
Monitoring Controller
Used in an application where the process is continually checked to alert the
operator of possible application malfunctions.
Most Significant Bit (MSB)
The bit representing the greatest value of a nibble, byte, or word.
Most Significant Digit (MSD)
The digit representing the greatest value of a byte or word.
Motor Controller
A device or group of devices that serve to govern, in a predetermined
manner, the electrical power delivered to a motor.
Motor Starter
See Motor Controller.
MSB
See Most Significant Bit.
MSD
See Most Significant Bit.
Multiple-Rung Display
A feature that allows a number of rungs of program logic to be displayed
simultaneously on the industrial terminal.
