Allen-Bradley SLC 500 - SLC 5;02 Processor Hardware Features

5–4 Identifying the Components of Your Processor
Publication 1747-6.2
The SLC 5/02 processor offers an enhanced instruction set, increased
diagnostic capabilities, and expanded communication capabilities
beyond the SLC 5/01 processors and fixed controllers. The SLC
5/02 provides:
• program memory size of 4K instructions
• control of up to 4096 input and output points
• PID – used to provide closed loop process control
• indexed addressing
• interrupt capability
• user fault routines
• ability to handle 32-bit signed math functions
• built-in DH-485 communication channel (initiation of
peer-to-peer communication)
• battery-backed RAM
• communication LED; when on, the LED indicates that there is
communication activity on the DH-485 network
• program using the Hand-Held Terminal (HHT) or programming
software
• UL listed, CSA approved, CE compliant
The table below provides a general explanation of each processor
status LED (for both the SLC 5/02 Series B and C).
➀
Processor
LED
When It Is Indicates that
RUN
On (steadily) The processor is in the Run mode.
RUN
(Color: red)
Off
The processor is in a mode other than Run.
Flashing (at power up) The processor has not been configured.
CPU FAULT
( olo )
Flashing (during operation)
The processor detects a major error either in the processor,
expansion chassis or memory.
(
C
olo
r: red
)
On (steadily) A fatal error is present (no communication).
Off There are no errors.
FO
R
CED I/O
Flashing
One or more input or output addresses have been forced to an
On or Off state but the forces have not been enabled.
FO
R
CED I/O
(Color: red)
On (steadily)
The forces have been enabled.
Off No forces are present or enabled.
BATTERY
LOW
On (steadily)
The battery voltage has fallen below a threshold level or the
battery and the battery jumper are missing.
LO
W
(Color: red)
Off
The battery is functional, or the battery jumper is present.
COMM
On (steadily) The SLC 5/02 is receiving data.
COMM
(Color: red)
Off The SLC 5/02 is not receiving data.
➀
See chapter 10 for more information on LED status.
SLC 5/02 Processor
Hardware Features
AB PLCs