31
Troubleshooting
Type ME64
12
TrOuBlEshOOTing
Problem
Possible cause
Measure
Namur LED remains off
despite supply voltage being
applied.
Switch for changing over the
supply voltage (underneath light
blue panel) set incorrectly.
Set correct voltage input.
Incorrect voltage input connection
used.
Use the correct connection.
NAMUR LED goes out
periodically.
The power supply drops out peri-
odically; the device implements a
reset each time.
Use power supply with adequate
power.
The voltage drop in the connection
cable is too great.
Increase cable cross-section.
Reduce cable length.
Device loses connection to
network.
Poor bus connection,
line too long,
incorrect termination.
Check receive errors,
check logbook.
The process values cannot
be assigned to the büS
participants.
The process values are not
configured.
Check the configuration of the
process values.
The transfer of the configuration
must be ended with a restart of the
device.
Reboot the device after configuration.
The process values are assigned to
different classes.
Check the assignment to ensure
that the büS participants are using
process values of the same class.
The input and output direction must
be observed as the assignment.
Check that the direction of the input
and output is correct.
An incorrect value is applied
or the value is zero.
The process values are not
assigned or are assigned to the
wrong participants.
Check the assignment of the process
values.
Table 15:
Troubleshooting
English
