Digital Output SBO Relay Module
11-6
4) Replace the DO SBO module in the rack.
5) If the new dip switch position causes the DO SBO relay power to be drawn from the
12VDO, plug the 2-pin TB back into the 12V DO Control on the front panel of the power
supply module.
Predefined Value (PDV)
In SBO modules, the predefined value (PDV) of each output is set to 0 and cannot be
configured. This value is executed when the user program stops or when the module has no
communication with the CPU module.
Sleep Mode
Each DO SBO module can be switched by the user program to Sleep Mode. In Sleep Mode,
the module does not function and the power consumption is minimized.
Module Status and Diagnostics
In the event of module failure, the module’s ERR LED will be lit. This event is registered by
the CPU in the Error Logger. Module failure status is also visible to the user program.
The DO SBO module can be diagnosed and monitored using the STS Hardware Test utility.
This test verifies that the module is operational, presents the module configuration and shows
the actual value of each output. It is also possible to change the DO’s value.
In the Hardware Test utility, it is possible to set the module to Freeze Mode. Freeze mode
enables testing the inputs and outputs while the user program is running.
For details on configuring the DO SBO modules, see the Configuring a Site section and the
Application Programmer section of the ACE3600 STS User Guide.
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