Total Solution for Industrial Automation
55
Chapter 7 Maintenance Work and Repair
7.3
Troubleshooting
This section describes errors that may happen during run-time and actions to be taken.
Check operating environments
See the following items prior to assessing PLC problems.
(1)
Check if the power is supplied properly. The input voltage of PLC must be maintained
in permissible range.
(2)
Check if each module is mounted or wired properly.
(3)
Please be advised that as the size of the scan program increases, response time will
decrease accordingly.
Product use precautions
(1)
Operate the product in the environment which meets the general specification.
(2)
Be sure not to let any foreign substances such as metallic dust or wiring debris inside
the product. Such debris may cause damage in product.
(3)
Do not touch the connector or remove the module when the power is supplied.
(4)
Do not separate or disassemble the module.
(5)
If F34 battery discharge error is ON, battery should be replaced.
(6)
Do not replace the battery yourself. The product only uses CR2302 lithium battery
200mAh, and may explode if replaced incorrectly. When replacement is required,
please contact CIMON service center.
(7)
Even though there is no battery discharge, if life cycle is exceeded then replacement of
product is recommended.
Wiring precautions
(1)
Use additional cable to protect the external input signal from surge or noise, which can
be caused by alternating current.
(2)
Cables must be chosen by considering surrounding temperature and permissible
current. The recommended size of cable is AWG16 ~ 28.
(3)
Be sure to keep distance from devices that can generate heat and avoid constant
exposure to oil. There is a potential for damage or malfunction due to short circuiting.
(4)
Do not wire with a high-voltage line or a power vessel. There is a danger to cause
malfunction or broken by induced lesion.
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