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Handling Problems
5-2
Handling Problems
Handling Problems
Preliminary Checks
Check item
Is the power supply
If the power supply is turned ON, the READY indicator will be
turned ON?
lit.
Was wiring per-
Check all of the wiring.
formed correctly?
Were settings per-
• Check the switches to see if they are set correctly.
formed correctly?
• Read out the settings to see if they have been set correctly.
• Read out all settings to see if any of them are incorrect.
Handling Problems
Condition
Communications
• If the SD/RD indicator does not light when communications
cannot be per-
are attempted, there is a problem with the communications
formed.
line. Check the wiring of the communications line.
• If a communications converter is being used, check the set-
tings of the converter to see if they are correct.
• Check the settings of SW1 and SW2 to see if they agree with
the settings of the host.
• Check the data length, number of stop bits, and parity to see
if they are the same as the host. If any of the settings are
incorrect or if any are unknown, use the following method for
communications.
1. Set SW2 to 7. (If more than 16 communications unit num-
bers are used, set SW2 to F.)
2. Set the baud rate, data length, number of stop bits, and par-
ity of the host to the default values for the G3ZA.
If a converter is being used, set the converter to the same
values.
3. This should enable communications. Change all settings to
the correct values.
• Check the communications line to see if it is correct.
Outputs do not turn
• Unless the OCC indicator is lit or the control variable is set to
ON.
0.0%, then there is a problem in the wiring. Check the wiring
of the control outputs.
• If the ERROR indicator is lit or flashing, refer to the correc-
tions given in the Error Table on page 32.
Returning settings to
• Initialize the settings with an Operation Command. All of the
default values
settings can be returned to their default values. Refer to the
Parameter Tables on page 38 in the Appendix for default val-
ues.
Section 5-2
Items to check
Correction
33
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