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LED Indicators
Five LED's are located on the Modbus Plus expansion board (see
Figure 4-1 for their locations).
D1 Modbus Plus Status LED
D1 displays the operational status of the Modbus Plus Interface
expansion board (EXB). When power is first applied, the LED will
pause, then flash slowly 8 times while it checks the network. If a valid
Modbus Plus connection is established, D1 will flash continuously.
Otherwise, it flash an error code as shown in Table 4-2.
LED State
Status Description
OFF
No power is applied to the EXB.
2 Flashes
The network is active, but the token is never passed to this
then pause
node. The node may have a bad transmitter.
3 flashes
No other nodes on the network.
then pause
4 flashes
Duplicate node numbers on the network.
then pause
D2 Error LED
D2 will flash 4 times then pause if any errors are encountered that would
prevent correct operation of the board. If this error occurs, turn the
control off, then on (cycle power). If error continues, the trouble could
be the expansion board, motor control board, or software version.
Correct the problem as required, and if the error remains, contact
Baldor.
D3 and D4 Status LED
D3 will flash to indicate that firmware is correctly loaded and running.
D4 will flash to indicate that the interface circuits between Modbus Plus
expansion board and the Series H control is running correctly. These
LEDs flash at different rates and, if flashing, indicate proper operation.
D5 Power LED
D5 indicates that the expansion board is receiving power from the
Series H control.
4-4 Hardware Setup
Table 4-2
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