Rockwell Automation 1771-DB BASIC MODULE - Manual (Page 104)

Chapter
Data Types 8
8 -4
The BASIC module communicates with the local processor through the
I/O chassis backplane. All data communicated to and from the PLC
processor is in PLC format.
The BASIC module interfaces with the PLC-2, PLC-3 and PLC-5 family
processors. Converted data is exchanged with programmable controllers
using block-transfers.
You can send these data type to the PLC processor:
SLC 16-bit signed integer (-32768 to 32767)
SLC 16-bit binary (0 to 65, 535)
16-bit binary (0000000000000000 to 1111111111111111)
3-digit, signed, fixed decimal BCD (+XXX.)
4-digit, unsigned, fixed decimal BCD (XXXX.)
4-digit, signed, octal (+XXXX)
6-digit, signed fixed decimal BCD (+XXXXXX.)
3.3-digit, signed, fixed decimal BCD (+XXX.XXX)
floating point (
±
1.1754944E –38 to
±
3.4028237E +38 )
You can send these data types to the BASIC module:
16-bit signed integer (-32768 to 32767)
SLC 16-bit unsigned integer (0 to 65,535)
SLC 16-bit binary (4 Hex digits)(XXXX)
3-digit, signed, fixed decimal BCD (+XXX.)
4-digit, unsigned, fixed decimal BCD (XXXX.)
4-digit, signed, octal (+XXXX.)
6-digit, signed, fixed decimal BCD (+XXXXXX.)
3.3-digit, signed, fixed decimal BCD (+XXX.XXX)
floating point (
±
1.1754944E –38 to
±
3.4028237E +38 )
SLC 16-Bit Signed Integer
This value requires one word of the processor data table. The data is
represented by 15 integer bits and one sign bit, bit 15. The value ranges
from –32,768 to 32,767. If you use a value that is not within this range
you get a
BAD ARGUMENT error and program execution halts. Note that
these calls are used with DH-485 calls .See CALL 14 (page 12 -8) and
CALL 24 (page 12 -15).
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Integer Value
15031
sign bit (1 = negative; 0 = positive)
Backplane Conversion
Data Types