INSTALLATION
3-12
Hardware and Installation User Manual
3.4.2
Downloading Preset Constants — TI535 Models
The drum and timer/counter instructions have reserved sections of memory
where preset variables are stored. These variables may be changed with an
operator interface, such as a TCAM or VPU, without altering their value in the
RLL program. If you cycle power or execute AUX Function 10 or 11 while the
battery is enabled, switch 4 on DIP 1 determines whether values in preset
memory are retained or downloaded from the RLL program. If the battery is
dead, low, or disabled, the preset values are always downloaded from the RLL
program in an EPROM/EEPROM, if one is installed.
Refer to Figure 3-9. Turn switch 4 ON to have values downloaded from the RLL
program. Turn switch 4 OFF to have preset values retained.
DIP 1
ON
OFF
Retain
presets
Download
presets
Position not
selected
Position
selected
Push down
Figure 3-9
Switch Settings — TI535 Download/Retain Presets
Executing AUX Function 12 (PLC Complete Restart) with your
programming device causes the presets to be downloaded from
the RLL program, regardless of the state of this dipswitch.
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