Publication 1756-UM001G-EN-P - January 2007
36
Communicate over Networks
The controller supports several ladder diagram (LD) and structured
text (ST) instructions to manipulate ASCII characters.
Read and Write ASCII Characters
Create and Modify Strings of ASCII Characters
Convert Data to or from ASCII Characters
Instruction Code
Command
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
Command
CONCAT
Add characters to the end of a string
DELETE
Delete characters from a string
FIND
Determine the starting character of a sub-string
INSERT
Insert characters into a string
MID
Extract characters from a string
Instruction Code
Command
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
Содержание controllogix 1756-L55M12
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Страница 10: ...Publication 1756 UM001G EN P January 2007 10 Notes...
Страница 20: ...Publication 1756 UM001G EN P January 2007 20 Directly Connect to the Controller via the Serial Port Notes...
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Страница 82: ...Publication 1756 UM001G EN P January 2007 82 Develop Applications Notes...
Страница 122: ...Publication 1756 UM001G EN P January 2007 122 Maintain Nonvolatile Memory Notes...
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Страница 134: ...Publication 1756 UM001G EN P January 2007 134 LED Indicators Notes...