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10-5
Section
Troubleshooting Procedures
181
2. Is the P/S indicator lit?
True
'
Step 5..
3. Is a 24-VDC power supply connected?
True
'
Replace the following items in order to remove the faulty part: Power
supply cable, Power Supply Unit, Ethernet Unit.
4. Connect a 24-VDC power supply.
5. Is the power supply indicator lit on the transceiver?
True
'
Step 8.
6. Is the transceiver cable loose?
True
'
Connect the cable firmly.
7. Replace the following components one at a time in the order given and dis-
card any faulty ones: transceiver cable, transceiver, Ethernet Unit.
8. Execute
ping
at each node for all nodes on the network to see if commu-
nications are possible.
9. Was not even one response received at every node in the network?
True
'
Check terminators, the coaxial cable, and transceiver cables.
10. Were responses not received only between certain nodes?
True
'
Make sure the distance between transceivers on the coaxial cable is
a multiple of 2.5 m.
Check IP address settings.
Make sure that the remote node supports ICMP.
11. Is an FTP client not mounted on the remote node?
True
'
Mount an FTP client.
12. Are you using FINS communications (e.g., SEND(090), RECV(098), or
CMND(490))?
True
'
Do an internode test.
13. Read protocol status using the FINS command READ PROTOCOL STA-
TUS and check the following parameters in the returned status data. If any
of these items have actually been counted, the remote node may not sup-
port the relevant service.
IP (all communications): Items 2 through 6
ICMP (PING): Items 5 through 8
TCP (FTP and TCP sockets): Items 4 through 6 under reception status
UDP (FINS and UDP sockets): Items 1 through 3
If item 4, 8, or 9 under the IP status is being counted, there may be too much
traffic through the Ethernet Unit. Check your user applications.
10-5-7 Mail Problems
Most of the initial steps in these procedures are in question form. Continue in
sequence until a “True” answer tells you to jump to a specified step or until you
are told to perform a specific action that corrects the problem. If performing the
action does not correct the problem, return to the beginning of the procedure and
start over.
1, 2, 3...
1. Is the ERH indicator lit?
True
'
Correct mistakes in the Setup
Correct the SMTP server address (it is set to 255.255.255.255 or
127.*.*.*).
Correct the local mail address.
Correct the notification destination mail address.