Omron NE1A-SCPU01 - 07-2009 Operation Manual page 284

Errors When Downloading
Message displayed on the Network
Configurator
Connection failed.
Program incomplete. Start Logic
Editor and check program.
250
Tried to configure a device on the DeviceNet or EtherNet/IP network via the NE1A-
series Controller's USB port, but connection failed. Check that power is turned ON to
the device and download again.
If the above cause does not apply, noise or other factors may be making communica-
tions unstable. Check the following items.
• Do all nodes have the same baud rate?
• Is the cable length correct (trunk lines and branch lines)?
• Is the cable disconnected or slack?
• Is the terminating resistance only on both ends of the main line?
• Is there a lot of noise?
There are open inputs or outputs in a function block used in the user program.
Click the Edit Button on the Logic Tab Page to open the logic and perform the following
measures.
• Connect the open inputs or outputs.
• Change the number of I/O setting for the function block to delete the open
input or output.
Function blocks with open inputs or outputs can be searched by using Edit – Find
Function Blocks with Open Connections. For information on open function block
connections, refer to Finding Function Blocks with Open Connections in 5-3-3 Program-
ming Using Function Blocks and Precautions Updating from Network Configurator Ver-
@
sion 1.3 to a Higher Version in the DeviceNet Safety System Configuration Manual
(Z905-E1-07 or higher).
Countermeasure
Section 12-5