7.4 Replacing Safety Node Unit
For replacing a safety node unit, satisfy the following requirements:
•
Switch off the power supply of the node
• The safety node unit can be replaced while the Safety Control Unit is running
When the SCS is running (online), it is necessary to be very careful to proceed according to
the following procedures.
n
Procedure of Replacing Safety Node Unit
1. Check the Bus1 and Bus2 status on the SCS state management window beforehand.
2. Switch off the power supply of the safety node unit to be replaced.
3. While the ESB bus cable is connected, remove the branch connector unit for ESB bus
from the SSB401 for ESB bus 1.
4. Make sure on the SCS state management window that there is no abnormality occurred
other than in the node to be replaced.
5. While the ESB bus cable is connected, remove the branch connector unit for ESB bus
from the SSB401 for ESB bus 2.
6. Replace the node. And make sure that the SSB401 address is correct.
7. Connect branch connector unit for ESB bus to the new SSB401.
8. Switch on the node power supply.
9. Make sure that the replaced node is running properly on the SCS state management win-
dow.
<7.4 Replacing Safety Node Unit > 7-27
IM 32Q06C10-31E 4th Edition : Jan.30,2015-00
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