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6053/6055 Modbus Plus Communications Interface
Appendix B Troubleshooting
6053/6055 Modbus Plus TechBox Status LEDs
LED Indications
Cause/Symptom
Remedy
NETWORK MODULE
(OFF)
No power at the drive.
Check and apply power to the drive.
Technology Box/Option not
installed correctly.
Check connections between Technology
Box/Option and drive. On 605A & B, check the
ribbon cable.
Hardware fault.
605A & B WARNING
: Remove
the terminal cover and the
Technology Box whilst connected to
see the drive’s HEALTH and RUN
LEDs.
BEWARE OF ELECTRIC SHOCK.
If HEALTH and RUN LEDS are OFF, replace the
drive, else replace the Technology Box/Option.
The self-test has failed.
Replace the Technology Box/Option.
Incorrect Technology Box/Option
fitted or selected.
Fit the correct Technology Box/Option or select the
matching value for the TYPE parameter in the TEC
OPTION function block. (TYPE = MODBUS PLUS).
Set-up fault. A TEC OPTION
parameter is out-of-range.
Select the correct value for the parameter in the
TEC OPTION function block.
No network connection.
Technology Box/Option not configured correctly
(e.g. NODE ID set to 0), or performing self-test.
No network connection.
Node is offline after just being powered-up or
exiting the Duplicate Station state. It remains in this
state for 5 seconds and then attempts to go the
Normal Link operating state.
Network connection; the node is not
hearing any other nodes, or the
node is hearing the token being
passed between other nodes, but is
never receiving it.
Check the network for an open circuit or defective
termination.
Network connection; the node has
heard a valid message from
another node using this node's
address.
The node remains in this state until the duplicate
address is not heard for 5 seconds.
Network Connection; no faults
The node's normal operating state. Successfully
receiving and passing the token.
