Description
(Original Document)
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Function Block Name
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Function Description
The purpose of the L9_XMIT function block in conversion mode is to take data and convert it into other usable forms based upon your application needs. The convert block performs 11 different functions or options. Some functions include ASCII to binary, integer to ASCII, byte swapping, searching ASCII strings, and others. This block allows internal conversions using %MW source blocks to %MW destination blocks.
For an overview of the L9_XMIT function block please see Description.
Representation
Parameter Description
Input Pin
Name
Data Type
Address Range
Meaning
Top
ENABLE
BOOL
–
ON begins an L9_XMIT function block operation and it should remain ON until the operation has completed successfully or an event has occurred.
NOTE: To reset an L9_XMIT function block event and clear the event memory word, the top input must go OFF for at least one PLC scan.
Node
Node Type
Name
Data Type
Address Range
Meaning
Top
constant #0001
IN
PORTNO
UINT
1..2
The top node must contain a constant (#0000) since conversions do not deal with the PLC’s port.
Middle
IN/OUT
CONTROL
ARRAY[1...16] OF UINT
%MW
The %MW entered in the middle node is the first in a group of eight (8) contiguous memory words that comprise the control block, as shown in the Conversion Mode Control Table.
Important: DO NOT modify the address in the middle node of the L9_XMIT function block or delete the address from the program while the block is active. This action locks up the port preventing communications.
Bottom
constant = #0008
IN
LENGTH
UINT
8
The bottom node must contain a constant equal to (#0008). This is the number of memory words used by the L9_XMIT function block conversion.
Output Pin
Name
Data Type
Address Range
Meaning
Middle
STOPPED
BOOL
–
ON when the L9_XMIT function block has detected an event or was issued an abort.
Bottom
SUCCESS
BOOL
–
ON when an L9_XMIT function block operation has been successfully completed.