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Troubleshooting 7-3MN1919
7.2.1 Communication
Problem Check
Status LED is off Check that the 24VDC control circuit supply is connected correctly to
connector X2 and is switched on.
Mint WorkBench
fails to detect the
MicroFlex - it
detects “No
controller found.
Communication
fault on COMx”.
Ensure that the MicroFlex is powered and the S tatus LED is
illuminated (see section 7.2).
Check that the serial cable is connected between the PC’s COM port
and connector X6 on the MicroFlex.
Check which PC COM port is being used, or use the “Scan all serial
ports” option to locate the MicroFlex.
Check the wiring of the serial cable or try an alternate cable.
On the PC, try an alternative COM port.
Confirm that a mouse driver or other serial device is not conflicting
(using the same COM port) as Mint WorkBench.
Does the MicroFlex have firmware in it? If you tried to download new
firmware and the download failed, the controller may not have
firmware.
Check that the selected baud rate is supported by the PC and
MicroFlex.
If the “Only scan COMx” option is selected in Mint WorkBench, check
that the correct COM port is selected.
If the “Search up to Nodexx“ option is selected in Mint W orkBench,
check that the MicroFlex node number is not higher than this value, or
search up to a greater node value.
Do you have multiple nodes on the bus? If so, they must all be set to
the same baud rate. Mint WorkBench scans through all the node ID’s
at different baud rates. When it finds a node, it will only continue to
scan for other nodes at the same baud rate.
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