Rockwell-automation 2707-NP DTAM Programming Software Manual de usuario descargar pdf (Pagina 172)

Appendix D

Data Formats

D–2

Bit Format

Bit Data

16 Individual Bits

(One 16 Bit address)

16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

The controller stores a binary (0 or 1) status at each bit address. The DTAM

Plus reads a PLC bit address and determines 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”. DTAM Plus Programming Software 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 the 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.

16 Bit Signed Integer

Range = -32768 to +32767

Bit 16

(Sign Bit)

Bit 1

16 Bit Data Field

This data format displays a 16 bit register as a signed Integer (two’s

complement) value. The 16th bit of the register is the sign bit and is set (1)

for a negative and cleared (0) for a positive number.

Note: The 16 bit signed integer values have a range of -32768 to +32767.

This data format may also be scaled to different engineering units.

1 2 ... 167 168 169 170 171 172 173 174 175 176 177 ... 183 184

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Rockwell-automation 2707-NP DTAM Programming Software Manual de usuario Pagina 172