User`s manual

CHAPTER 2: PROGRAMMING
7
Bit (KM)
16 individual bits
(One 16-bit location)
151413121110987654321
Bit Data
0
LSB
MSB
The PLC stores a binary (0 or 1) status for a bit location. The SOI will
read a PLC bit location and determine whether the operational status of
the bit is ON (1) or OFF (0). You can specify associated text to be
displayed for either state of a specified bit. This description can be up to
twenty characters.
For example, the OFF(0) state of a bit might display “Pump is OFF,”
and the ON (1) state “Pump is ON.” SOI-SPS allocates enough screen
characters for the longest of the two text strings. In this example, 11
characters would be allocated to display “Pump is OFF.”
Note: The fewer characters used, the less memory is required. In the example
above, displaying "OFF" (given the appropriate context) conveys the
same information in 3 characters as "Pump is OFF" does with 11
characters.
8-Bit Unsigned Integer (Byte, KB)
8-Bit Data Field
Bit 7
Range = 0 to +255
Bit 0
8-Bit Unsigned Integer
LSB
MSB
This data format displays a 8-bit register as an Unsigned Integer value.
It represents a positive number by using the 8th bit as a data bit rather
than a sign bit. The 8-bit Unsigned Integer values have a range of 0 to
+255.
Note: This data format may be scaled to different engineering units.