Technical information

Glossary
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IL
A program written in the instruction list language is composed of a series of
instructions executed sequentially by the controller. Each instruction includes a line
number, an instruction code, and an operand. (IL is IEC 61131-3 compliant.)
INT
A single integer is encoded in 16 bits.
L
latching input
A latching input module interfaces with devices that transmit messages in short
pulses. Incoming pulses are captured and recorded for later examination by the
application.
LCD
liquid crystal display
LD
A program in the ladder diagram language includes a graphical representation of
instructions of a controller program with symbols for contacts, coils, and blocks in a
series of rungs executed sequentially by a controller. IEC 61131-3 compliant.
M
MAC address
The media access control address is a unique 48-bit number associated with a
specific piece of hardware. The MAC address is programmed into each network
card or device when it is manufactured.
MAST
A master (MAST) task is a processor task that is run through its programming
software. The MAST task has two sections:
z IN: Inputs are copied to the IN section before execution of the MAST task.
z OUT: Outputs are copied to the OUT section after execution of the MAST task.