Operating Instructions

System 600 APOGEE Blocks
Siemens Building Technologies, Inc. 4-13
Logical Digital Output (LDO)
Figure 4-9 shows the dialog box used to configure an LDO point block. An LDO point
provides one commandable digital state (used to command two-position ON/OFF devices
such as fans and lighting).
Figure 4-9. Logical Digital Output Dialog Box.
All of the fields in Figure 4-9, except for two, are the same as those described for the Logical
Analog Input Dialog Box. Refer to the LAI descriptions for more information regarding these
fields. The two exceptions are the addition of the Initial Value field, and the replacement of
the Engineering Limits field with the Labels field.
Initial Value
For Intellution programming use. Allows the operator to set the value of a point when it is
placed on scan (e.g., to turn on all fans before a batch is run). This does not affect the initial
value set in field panels.
Labels
Can be a label of up to 13 characters displayed when using an ASCII Data Link. System 600
APOGEE labels are the default and may be overridden by entering the label of choice.
Defaults are listed in Table 4-8.
Table 4-8. Default Labels.
Floating Point ASCII
0.0 OFF
1.0 ON