Omron SYSMAC C200HW-PCS01-EV1, Operation Manual

Page: 218 / 261

202
The PING command is normally used to check the connections of remote nodes
when configuring a network. The PC Card Unit supports both the ICMP echo
request and reply functions.
C
P
U
TCP UDP
ICMP IP
ETHERNET
Echo request
Response
Remote node (host com-
puter or PC Card Unit)
PC Card Unit
The PING command can be executed from the host computer to send an echo
request packet to a PC Card Unit. The method for using the PING command
from a Unix computer is described below.
Using PING from a Unix Computer
Input the following at the host computer prompt ($):
$ ping
IP_address (host_name)
The destination is specified by its IP address or host name. If the host name is
used, the host name must be defined in file /etc/hosts.
Note The PING command is not supported by some host computers.
Application Examples
These examples show sending the PING command to the node at IP address
130.25.36.8. The “$” on the example screen represents the host computer
prompt. User inputs are underlined. Comments are placed after semicolons.
Normal Execution
$ ping 130.25.36.8
; Executes PING command
PING 130.25.36.8: 56 data bytes
64 bytes from 130.25.36.8: icmp_seq=0. time=0.ms
64 bytes from 130.25.36.8: icmp_seq=0. time=0.ms
. . .
. . .
. . .
64 bytes from 130.25.36.8: icmp_seq=0. time=0.ms
←
Enter DEL key to cancel.
;User presses DEL key.
––––130.25.36.8 PING Statistics––––
9 packets transmitted, 9 packets received, 0% packets loss
round-trip (ms) min/avg/max = 0/1/16
$
Abnormal Execution
$ ping 130.25.36.8
; Executes PING command
PING 130.25.36.8: 56 data bytes
←
Enter DEL key to cancel.
;User presses DEL key.
––––130.25.36.8 PING Statistics––––
9 packets transmitted, 0 packets received, 100% packets loss
$
Refer to operating system documentation for your host computer for details
about using the host computer’s PING command.
Using the Host Computer
Troubleshooting
Section 12-2