Universal Robots UR12e User Manual page 167

11. Fieldbus
Signal This icon shows whether the signal can be properly read/written (green), or if the unit responds
connec unexpected or is not reachable (gray). If a MODBUS exception response is received, the response
tivity code is displayed. The MODBUS-TCP Exception responses are:
status
E1
E2
E3
E4
E5
E6
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User Manual
ILLEGAL FUNCTION (0x01) The function code received in the
query is not an allowable action for the server (or slave).
ILLEGAL DATA ADDRESS (0x02) The function code received in
the query is not an allowable action for the server (or slave), check
that the entered signal address corresponds to the setup of the
remote MODBUS server.
ILLEGAL DATA VALUE (0x03) A value contained in the query data
field is not an allowable value for server (or slave), check that the
entered signal value is valid for the specified address on the remote
MODBUS server.
SLAVE DEVICE FAILURE (0x04) An unrecoverable error occurred
while the server (or slave) was attempting to perform the requested
action.
ACKNOWLEDGE (0x05) Specialized use in conjunction with
programming commands sent to the remote MODBUS unit.
SLAVE DEVICE BUSY (0x06) Specialized use in conjunction with
programming commands sent to the remote MODBUS unit, the
slave (server) is not able to respond now.
168 UR12e