DB Connection Service is Stopped
The DB Connection Service is stopped in the following cases.
When the DB Connection Service is stopped by a DB_ControlService (Control DB Connection
Service) instruction or Sysmac Studio.
When the operating mode of the CPU Unit is changed to PROGRAM mode.
When the Synchronization (download) operation is executed (regardless of whether the DB
Connection settings are transferred)
When the Clear All Memory operation is executed
When the Restore Controller operation is executed from Sysmac Studio
When a major fault level Controller error has occurred
When the DB Connection Service is shut down
Additional Information
If you stop the DB Connection Service when it is waiting for a response from the DB after
sending an SQL statement, the DB Connection Service is stopped after it receives the
response from the DB or a communications error is detected.
If a DB Connection has been established when the DB Connection Service is stopped,
the DB Connection is closed.
4-1-4 Changing the Run Mode of the DB Connection Service
You cannot change the Run mode of the DB Connection Service between Operation Mode and
Test Mode while the service is running.
To change the Run mode, stop the DB Connection Service and then start the service again.
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