
Chapter 2
The PLC-5 802.4 MAP/OSI Coprocessor
2-6
The OSI coprocessor has five LEDs on the front panel. At power–up, the
LEDs cycle through each of their colors (either red or green) so you can
visually inspect them. Each LED has a specific function. Figure 2.4
provides an overview of each LED.
Figure 2.4
The OSI Coprocessor's LEDs
This LED indicates the overall condition of the
coprocessor.
If this LED is:
Then the coprocessor is:
green
red
functioning properly and has passed all
hardware diagnostics.
faulted and service is required before
normal operation can continue.
Pass/Fail LED
This LED indicates the coprocessor's operating mode.
Mode LED
Mode:
Description:
partially
operational
fully
operational
the coprocessor is waiting for the OSI
protocol software to be downloaded via the
MAP station manager, or has transitioned to
this mode due to a fault while in fully
operational mode.
this is the mode of normal operation where
the coprocessor can perform all
communication functions.
off
flashing
the coprocessor is in partially operational
mode and has a valid image loaded (able
to go fully operational).
the coprocessor is in partially operational
mode and a new image must be loaded in
order to transition to fully operational
mode.
red
the coprocessor has a valid image and
is in fully operational mode.
a diagnostic test failure has occurred. If
the coprocessor has faulted, the pass/fail
LED should also be red (service is
required before normal operation can
continue).
solid
green
solid
red
If this LED is red, this indicates that the batter power is
not sufficient to retain non-volatile memory if power to
the coprocessor is removed. You should replace the
battery with a new one if you want this storage preserved
in the event of a power loss.
Refer to the OSI coprocessor's Installation Data
(publication 1785-2.23 and 1785-2.24) for battery
replacement instructions.
Battery Low LED
This LED indicates the presence of communication
activity in the coprocessor.
Activity LED
If this LED is: Then the coprocessor is:
green
off
receiving or sending messages.
not receiving or sending messages.
The LED:
off
flashing
Indicates:
red
the coprocessor is not ready to
communicate.
the coprocessor is ready to
communicate.
an unrecoverable communications
error has occurred and service is
required.
a recoverable communications error has
occurred, which can possibly be fixed with
reconfiguration
802.4 Status LED
solid red
This LED indicates the status of coprocessor's network
communication.
PASS
PASS
MODE
ACT
BATT
802.4
STATUS
RS-232
solid
green
Then:
If this LED is:
I - 12418
The LEDs
Содержание PLC-5 MAP/OSI
Страница 1: ...PLC 5 MAP OSI Software User Manual Cat No 1785 OSI AB Parts...
Страница 4: ...Table of Contents iii OSI Layer Management E 1...
Страница 57: ...Chapter 4 Basic Programming Techniques 4 7 For example B7 6 10 AB Parts...
Страница 91: ...Mapping MMS Data Types onto PLC 5 40 5 60 File Types Appendix A A 2 T ACC D 16 AB Parts...