Rockwell Automation 1771-DB Basic Module User Manual - Series A - Manual (Page 14)

Isolation
G
The Programming Port is isolated from
the 1771 I/O backplane. (+500 V)
G
The Peripheral Port is isolated from
the 1771 I/O backplane. (+500 V)
G
The Programming Port is isolated from
the Peripheral Port. (+500 V)
Communication Rates
G
300, 600, 1200, 2400, 4800, 9600,
19.2 K bits
G
Communication rates/distances
Wall-clock accuracy
G
Absolute: v " 5 min/month @ 25 °
C
G
Drift v " 50 ppm/ °
C
G
Drift v " 50 ppm/year @ 25 °
C
Port driver and receiver
G
Drive output +3.6 V minimum
G
Receiver sensitivity 200 mV minimum
Math
G
Precision: 8 significant digits
G
Range: "1E-127 to
"99999999E+127
G
Formats: integer, decimal,
hexadecimal and exponential
Module location
G
One 1771 I/O chassis module slot
Backplane power supply load
G
1.5 A
Environmental Conditions
G
Operational temperature: 0
°
C to 60
°
C
(32
°
F to 140
°
F)
G
Storage temperature: -40
°
C to 85
°
C
(-40
°
F to 185
°
F)
G
Relative humidity: 5% to 95%
(non-condensing)
Keying (top backplane connector)
G
Between 8 and 10
G
Between 32 and 34
G
Formats: integer, decimal,
hexadecimal and exponential
G
Formats: integer, decimal,
hexadecimal and exponential
@@@@ Drive output +3.6 V minimum
@@@@
@@@@
@@@@
Introducing the BASIC Module
Chapter 2
2–4
You can start program execution:
by entering commands at the interactive terminal.
at power-up initialization.
You can store and execute programs in RAM or EPROM. You can store
one user-program in RAM and up to 255 (depending on program size)
independent user-programs simultaneously in EPROM memory.
The programs run single-task mode only. You can generate the following
data types with the BASIC Module:
16-bit binary (4 hex digits)
3-digit, signed, fixed decimal BCD
4-digit, unsigned, fixed decimal BCD
4-digit, signed, octal
6-digit, signed, fixed decimal BCD
3.3 digit, signed, fixed decimal BCD
Refer to Chapter 7, “Data Types” for more information.
Communication Maximum Distance Allowed ommunication
Rate (bps) RS-232-C RS-423 RS-422
300 50 4000 4000
600 50 3000 4000
1200 50 2500 4000
4800 50 800 4000
9600 50 400 4000
19,200 50 200 4000
2.4
Software Features
(continued)
2.5 Specifications