3 Programming the DB Connection Function
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NJ/NX-series Database Connection CPU Units User’s Manual (W527)
3-5-5 Simulation Debugging of DB Connection Instructions
You can perform operation check of the user program using the Simulation function of Sysmac
Studio.
The DB Connection Instructions perform the following operations during simulation.
ï‚– The DB_Connect, DB_Close, DB_Insert, and other instructions that do not retrieve data will end
normally.
ï‚– The DB_Select and other instructions that retrieve data will end normally as if there was no
applicable data.
3-5-6 Transferring the DB Connection Settings and User Program
You transfer the DB Connection settings and user program to an NJ/NX-series CPU Unit using
the Synchronization function of Sysmac Studio.
You can specify the following comparison unit for the DB Connection Service in the
Synchronization Window.
Synchronization data name Level Number
Detailed
DB Connection Service Settings
The DB Connection settings are reflected when the DB Connection Service is started.
Precautions for Correct Use
If an operation failure or communications error occurs when you execute an operation
from Sysmac Studio, retry the operation after performing the following:
ï‚— Check the cable connection.
ï‚— Check the communications settings.
ï‚— Increase the response monitoring time in the Communications Setup.
ï‚— Increase the system service execution time ratio.
ï‚— Check that the operation status of the DB Connection Service is not Initializing, Error,
or Shutdown.
For details of the operation status of the DB Connection Service, refer to 4-3-1 Operation
Status of the DB Connection Service.
When Sysmac Studio cannot go online, refer to the NJ/NX-series Troubleshooting Manual
(Cat. No. W503).