Rockwell Automation 1756-NEX Nexus Module - Manual (Page 65)

1756-CLX/C Module Backplane Communication Tag List D-7
Publication 1756-UM524B-EN-P - December 2008
1756-CLX/C Module Receiving Procedure
The following tags are applied for this sequence. Refer the timing chart for more details.
• NX31_Receive_Done
• NX51_Receive_Request
• NX62_Receive_Error_Code
Figure D.6 1756-CLX/C Module Receiving Procedure Timing Chart
CLX
NX51_Receive_
Request
(BOOL)
NX31_Receive_Done
(BOOL)
1756-CLX/C
NX
Recv-Process
(xx:00-31)
Ladder
(1) Check NX62_Receive_Error_Code has
not set Error, and read data from
NX91_Receive_Data_xx( the size is set to
NX90_Received_Data_size[xx] )
(2) NX31_Receive_Done ON
Clears
NX31_Receive_Done
(1) Clears NX62_Receive_Error_Code
(2) Clears NX51_Receive_Request
(1) Receiving data
(2) If success
Sets NX91_Receive_Data_xx
Sets NX90_Received_Data_size[xx]
(3)Sets NX62_Receive_Error_Code
(4)Sets NX31_Receive_Request
(xx:00-31)
Tags
NX62_Receive_
Error_Code
(DINT[32])
0 if success, Error code if failure