Rockwell Automation 1769-L23E-QB1B_L23E-QBFC1B_L23-QBFC1B CompactLogix Packaged Controllers Quick Start and User Manual - Manual (Page 175)

Publication IASIMP-QS010B-EN-P - October 2009 175
Network Communication Chapter 2
Read and Write ASCII Characters
Create and Modify Strings of ASCII Characters
Convert Data to or from ASCII Characters
Instruction Code Description
ABL Determine when the buffer contains termination characters
ACB Count the characters in the buffer
ACL Clear the buffer
Clear out ASCII Serial Port instructions that are currently executing or
are in the queue
AHL Obtain the status of the serial port control lines
Turn on or off the DTR signal
Turn on or off the RTS signal
ARD Read a fixed number of characters
ARL Read a varying number of characters, up to and including the first set of
termination characters
AWA Send characters and automatically append one or two additional
characters to mark the end of the data
AWT Send characters
Instruction Code Description
CONCAT Add characters to the end of a string
DELETE Delete characters from a string
FIND Determine the starting character of a substring
INSERT Insert characters into a string
MID Extract characters from a string
Instruction Code Description
STOD Convert the ASCII representation of an integer value to a SINT, INT,
DINT, or REAL value
STOR Convert the ASCII representation of a floating-point value to a REAL
value
DTOS Convert a SINT, INT, DINT, or REAL value to a string of ASCII characters
RTOS Convert a REAL value to a string of ASCII characters
UPPER Convert the letters in a string of ASCII characters to upper case
LOWER Convert the letters in a string of ASCII characters to lower case