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6-4 Maintenance
Inspection Procedure
Check the items in the following table and correct any condition that is below standard.
Inspection item
Details
Standard
Equipment
Are ambient and panel
temperatures correct?
Refer to the specifications
for each DST1.
Thermometer
Are ambient and panel
humidity correct?
Refer to the specifications
for each DST1.
Hygrometer
Environmental
conditions
Has dust or dirt accumulated?
No dust or dirt
Visual inspection
Is the DST1 installed securely? No looseness
Phillips screwdriver
Are the connectors of the
communications cables fully
inserted?
No looseness
A flat-blade
screwdriver
Are the external wiring screws
tight?
No looseness
A flat-blade
screwdriver
Installation
conditions
Are the connecting cables
undamaged?
No external damage
Visual inspection
Safety relay
operation
Does the safety relay contact
go to OFF state?
No welded contacts
Visual inspection
•
The maintenance interval for the relay contacts must not exceed a
period of 6 month to meet safety category 4 in accordance with EN
954-1.
IMPORTANT
•
The G7SA-2A2B must be used when replacing safety relays.
6-4-3
Replacing the DST1
The network consists of the DeviceNet Unit (master) and DST1 Terminals. The entire
network is affected when a DST1 is faulty, so a faulty DST1 must be repaired or
replaced quickly. We recommend having spare DST1 Terminals available to restore
network operation as quickly as possible.
Precautions for Replacing the DST1
Observe the following precautions when replacing a faulty DST1.
After replacement, make sure that there are no errors in the new DST1.
When a DST1 is being returned for repair, attach a detailed description of the problem
and return the DST1 to your OMRON representative.
If there is a faulty contact, try wiping the contact with a clean, lint-free cloth dampened
with alcohol.
Settings after Replacing a DST1
After replacing a DST1, set the new DST1’ s switches and configuration data to the
same settings that were used on the old DST1.
WARNING
Safety functions may be impaired and serious injury may occasionally
occur. When replacing a device, configure the replacement device suitably
and confirm that it operate correctly.
6-8
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Страница 5: ...DST1 series Safety I O Terminals Operation Manual Produced April 2005 ...
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Страница 24: ...Section 1 Overview ...
Страница 44: ...Section 2 General Procedure ...
Страница 50: ...Section 3 Configuration ...
Страница 63: ...Section 4 Specifications ...
Страница 67: ...Section 5 DST1 series ...
Страница 79: ...Section 6 Troubleshooting and Maintenance ...
Страница 87: ...Section 7 Wiring Examples ...
Страница 97: ...Appendices ...
Страница 114: ...Cat No Z904 E1 01 OPERATION MANUAL DST1 series Safety I O Terminals ...