48
4-1
Troubleshooting Procedure
If the E5ZE has an error, refer to the following items to find the possible cause of
the error and take corrective measures.
1, 2, 3...
1. Indicators
Check the operating status of the E5ZE using the indicators.
If the ERR indicator is lit, turn the E5ZE OFF and ON. If the ERR indicator is
not lit after the E5ZE is turned ON, it may mean that the E5ZE is being in-
fluenced by noise. Find the source of the noise and provide adequate
protection against it.
2. Switch, Selectors, and Wiring
Check if the switch and selector settings of the E5ZE, the wiring of the E5ZE
and devices connected to the E5ZE are correct.
a) Power Supply
•
Check that the power supply connected to the E5ZE is turned ON.
•
Check whether the supply voltage at the power supply terminals is
within the allowable voltage range of the E5ZE.
b) Switch and Selectors
Check that the switch and selectors of the E5ZE are correctly set accord-
ing to the system.
c) Wiring
•
Check that the terminals and connectors are wired together correctly.
•
Check that the terminal block wiring is correct.
•
Check that the polarity of each wire connected to the E5ZE is correct.
•
Check if any wire is disconnected.
•
Check if a wire or cable is cut or short-circuited.
•
Check that the wiring-reduction devices connected to the E5ZE are the
correct designated ones.
d) Communications Conditions
Check that the communications conditions of the E5ZE are compatible
with the host device connected to the E5ZE.
Check the above items and remedy any problems listed above. If the error
persists after error processing, perform further checks through communica-
tions.
3. Checking through Communications
•
Check the end code and error code with the response returned from the
E5ZE.
•
Check the status of the E5ZE with the Status Read Command.
•
Check if the functions used with the E5ZE have any operating restrictions.
•
Check if the set data items of the communication commands used for the
E5ZE are correct.
Troubleshoot problems on the basis of the data read with the E5ZE.
Troubleshooting Procedure
Section 4-1
