Description

Naming

Name in LL984 Editor	Function Block Name
name of legacy 984 instruction	name in other tools and editors like: Type Library Browser Data Editor Animation Tables Search Results

Function Description

The L9_XMIT function block in port status mode shows the current port status, Modbus slave activity, ASCII input FIFO, and flow control information that may be used in ladder logic for some applications. The L9_XMIT function block in port status mode is totally passive. It does not take, release, or control the PLC port.

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.

Node	Node Type	Name	Data Type	Address Range	Meaning
Top port #0000, #0001, or #0002	IN	PORTNO	UINT	0...2	Contains one of the following constants: (#0000) to select PLC port #0, (#0001) to select PLC port #1, or (#0002) to select PLC port #2.
Middle	IN/OUT	CONTROL	ARRAY[1...16] OF UINT	%MW	The %MW entered in the middle node is the first in a group of seven (7) contiguous memory words that comprise the port status display block, as shown in the Port Status Display Table . Important: DO NOT modify the address in the middle node of the L9_XMIT function block or delete the address from the block while the block is active. This action locks up the port preventing communications.
Bottom constant = #0007	IN	LEN	UINT	7	Must contain a constant equal to (#0007). This is the number of memory words used by the L9_XMIT function block port status function block.

Output Pin	Name	Data Type	Address Range	Meaning
Middle		BOOL	–	ON when L9_XMIT function block has detected an event or was issued an abort.
Bottom		BOOL	–	ON when an L9_XMIT function block operation has been successfully completed.