AV6A 13
the dip switch 2 in the connection cap to “On” to force a hardware
address of 10.10.10.10. Reassemble the encoder. Connect the
PC to the encoder using standard (not cross-patch) cable. Power
the encoder using the second connection port (5-pin). The encoder
Link 1 should illuminate green. Use the Ping command, Run “ping
10.10.10.10”, and the encoder should reply, and the communication
“ping” time will be reported by the PC. The Rx1 should flash briefly
during the communication.
Check that only one Modbus TCP encoder is connected to each
cable. Use hubs or switches to connect multiple Modbus TCP
encoders to the master device.
A software “snoop” or “sniffer” program can also be used to packet-
analyze the communication.
If the position is changing as the encoder moves, but is reported
incorrectly, the Initial Value parameter may have been loaded into
the encoder at the wrong physical position of the machine. Drive the
machine to the home/preset position, and cycle power to see if the
position is correctly reloaded.
MODBUS/TCP Diagnostic LEDs
LED
Status
Meaning
Link 1
Green
Input connected to Ethernet, power OK,
node address ok, no Ethernet errors,
encoder operational
Rx1
Flashing
Yellow
Active inbound communication
Col1
Red
Ethernet Collision Errors
