Lon Works Network Troubleshooting; Troubleshooting Diagram 1 - IDEC LonWorks FC3A-SX5LS1 User Manual

L W Network Troubleshooting
ON ORKS
This section describes the procedures to determine the cause of trouble and actions to be taken when any trouble occurs
while operating the L
ON
Probable Causes for Network Errors
• A network cable is disconnected or shorted.
• Strong external noise
• The power voltage to the module has dropped below the minimum operating voltage at least momentarily.
• Use of a faulty communication line, cable other than twisted-pair cables, or transmission beyond the rated distance.
• Improper terminator

Troubleshooting Diagram 1

The POW LED on the L
interface module does not go on.
Is the POWER LED on
the CPU module on?
Are modules installed
correctly?
Call IDEC for assistance.
W interface module.
ORKS
W
ON ORKS
NO
YES
NO
YES
O N C
PEN ET ONTROLLER
Supply power to the power supply
terminals on the CPU module.
Is the POWER LED on
the CPU module on?
YES
NO
Is the POW LED on the
interface module on?
Install the modules correctly.
NO
Is the POW LED on the
interface module on?
L W I M
ON ORKS NTERFACE ODULE
L W I
ON ORKS NTERFACE
NO
See Troubleshooting in the
OpenNet Controller user's
manual EM333.
YES
YES
END
U ' M
SER S ANUAL
M
ODULE
25