Spectrum Controls 1746sc-INI4vi - Manual (Page 34)

30 SLC 500 ™ Isolated Analog Input Modules
Input Channel Enable (configuration bit 0)
Use this bit to enable or disable a channel. To minimize update times,
disable any unused channels.
When you set the channel enable bit to one, the module reads the
configuration word. Before accepting any new data as valid, verify that
the status word (described in the last subsection of this chapter) reflects
the changes you made.
While the channel enable bit is set to zero, the channel data word and
status word are also set to zero. When you reset the channel enable bit to
one, the channel data word remains set to zero until your module updates
the channel status word.
Input Range (configuration bits 1–3)
Use this bit field to configure the channel for the type of input device you
want to connect to your module.
Data Format (configuration bits 4–6)
Use this bit field to select one of the following formats:
• engineering units (mV or nA)
• scaled for PID (works with the SLC PID instruction)
• proportional counts (two’s complement binary)
• 1746-NI4 compatible format (the format used by the 1746-NI4)
• user-defined scale A
• user-defined scale B
These data formats are defined in the following table: