AMX NI-2100/3100/4100 - Manual (Page 91)

Programming
83 NI Series WebConsole & Programming Guide
RS-232/422/485 Send_String Escape Sequences
This device also has some special SEND_STRING escape sequences:
If any of the 3 character combinations below are found anywhere within a SEND_STRING program
instruction, they will be treated as a command and not the literal characters.
In these examples: = device.
RS-232/422/485 Send_Commands (Cont.)
Command Description
XON
Enable software
handshaking. Syntax:
SEND_COMMAND ,"'XON'"
Example:
SEND_COMMAND RS232_1,"'XON'"
Enables software handshaking on the RS232_1 device.
RS-232/422/485 Send_String Escape Sequences
Command Description
27,17,
Send a break character for a
specified duration to a
specific device. Syntax:
SEND_STRING ,"27,17,"
Variable:
time = 1 - 255. Measured in 100 microsecond increments.
Example:
SEND_STRING RS232_1,"27,17,10"
Sends a break character of 1 millisecond to the RS232_1 device.
27,18,0
Clear the ninth data bit by
setting it to 0 on all character
transmissions. Used in conjunction with the 'B9MON' command.
Syntax:
SEND_STRING ,"27,18,0"
Example:
SEND_STRING RS232_1,"27,18,0"
Sets the RS232_1 device's ninth data bit to 0 on all character transmissions.
27,18,1
Set the ninth data bit to 1 for
all subsequent characters to
be transmitted. Used in conjunction with the 'B9MON' command.
Syntax:
SEND_STRING ,"27,18,1"
Example:
SEND_STRING RS232_1,"27,18,1"
Sets the RS232_1 device's ninth data bit to 1 on all character transmissions.
27,19,
Insert a time delay before
transmitting the next
character. Syntax:
SEND_STRING ,"27,19,"
Variable:
time = 1 - 255. Measured in 1 millisecond increments.
Example:
SEND_STRING RS232_1,"27,19,10"
Inserts a 10 millisecond delay before transmitting characters to the RS232_1
device.
27,20,0
Set the RTS hardware
handshake's output to high
(> 3V). Syntax:
SEND_STRING ,"27,20,0"
Example:
SEND_STRING RS232_1,"27,20,0"
Sets the RTS hardware handshake's output to high on the RS232_1 device.