Watlow CLS200, MLS300 and CAS200 - Manual (Page 89)

Glossary
Communications Specification 83
Glossary
ACK (Acknowledge) A control code that signals that a syntactically correct
message packet has been received.
Address See Data table address and Device address.
AIM An analog input module for MLS controllers. Watlow Anafaze offers two
different modules: AIM-16 and AIM-32.
ASCII American Standard Code for Information Interchange. A code that
assigns numeric values to characters.
Baud rate The rate at which data is transmitted over a line, measured in bits per sec-
ond.
BCC Block Check Character. A method of error checking for packets.
Binary
numbers Numbers in base 2, where each digit has one or two distinct values (0 or
1).
Bit An abbreviation for binary digit. (A binary digit can have one of two dis-
tinct values, 0 or 1). A group of four bits makes up a nibble. A group of
eight bits makes up a byte.
Burst error An erroneous series of 1’s or 0’s in the communications bit stream.
Byte A group of eight bits.
Cleared, bit When a bit is “cleared,” it is set to False or 0. When a bit is “set,” it is set
to True or 1.
CLS Compact Loop System. A Watlow Anafaze PID controller with 4, 8 or 16
loops.
CRC Cyclic Redundancy Check. A method of error checking for packets.
Data table
address The logical address where data is located.