
17. EMBEDDED ETHERNET FUNCTION
B–63523EN–1/03
1978
3) Count the number of lost packets (to which no response is
returned).
If lost packets occur in this state, there is probably an influence of
noise from peripheral equipment.
Action: Locate the noise source and recheck the cabling to
eliminate the influence of noise.
2. Influence of noise from the installed machine
1) Next, release the emergency stop state of the machine to turn on
servo/spindle amplifier activation, then issue another ping
command from the personal computer.
2) Count the number of lost packets.
If this number is greater than the number of Item 1 above, the cause
is considered to be noise generated by the machine itself. In
general, the grounding of the machine or the grounding of the
communication destination is defective.
Action: Check the grounding of the machine and the
communication destination, and insulate the machine
from the communication backbone.