Allen-Bradley MicroLogix 1200 Reference Manual

1 Publication 1762-RM001C-EN-P
Chapter 20
ASCII Instructions
This chapter contains general information about the ASCII instructions
and explains how they function in your control program. This chapter is
arranged into the following sections:
General Information
•
Instruction Types and Operation on page 20-2
•
Protocol Overview on page 20-4
•
String (ST) Data File on page 20-5
•
Control Data File on page 20-6
ASCII Instructions
The ASCII instructions are arranged so that the Write instructions precede
the Read instructions.
Instruction Function Valid Controller(s) Page
ACL - ASCII Clear Buffer Clear the receive and/or transmit buffers.
•
MicroLogix 1200
•
MicroLogix 1500 Series B, FRN 4 or later
20-7
AIC - Integer to String Convert an integer value to a string. 20-8
AWA - ASCII Write with
Append
Write a string with user-configured characters
appended.
20-9
AWT - ASCII Write Write a string. 20-11
ABL - Test Buffer for Line Determine the number of characters in the buffer, up
to and including the end-of-line character.
•
MicroLogix 1200 Series B, FRN 3 or later
•
MicroLogix 1500 Series B, FRN 4 or later
20-14
ACB - Number of Characters
in Buffer
Determine the total number of characters in the
buffer.
20-15
ACI - String to Integer Convert a string to an integer value. 20-16
ACN - String Concatenate Link two strings into one. 20-18
AEX - String Extract Extract a portion of a string to create a new string. 20-19
AHL - ASCII Handshake Lines Set or reset modem handshake lines. 20-20
ARD - ASCII Read Characters Read characters from the input buffer and place them
into a string.
20-22
ARL - ASCII Read Line Read one line of characters from the input buffer and
place them into a string.
20-23
ASC - String Search Search a string. 20-25
ASR - ASCII String Compare Compare two strings. 20-26

Allen-Bradley MicroLogix 1200 Specifications

General

Brand	Allen-Bradley
Model	MicroLogix 1200
Category	Control Unit
Language	English