INTRODUCTION
I-E96-221A
4 - 1
SECTION 4 - OPERATION
INTRODUCTION
This section explains what happens during start-up, the LED
indicators and what they mean, and how to reset the module.
START-UP
At start-up, the IMCPM02 module checks its hardware using
power up diagnostics to verify that it is working. The eight red
status LEDs turn off when this operation is complete. The
IMCPM02 module performs a series of tests at power up to ver-
ify correct operation of the hardware before enabling communi-
cations with the Controlway/module bus and serial channels.
Any error causes the IMCPM02 module to halt immediately
and display an error code on the faceplate LEDs.
RED/GREEN STATUS LED
The status LED is a red/green LED that shows IMCPM02 mod-
ule operating condition. There are three possible states:
Off
No power (momentarily off when processor initializes on power
up).
Green
Execute mode.
Red
The IMCPM02 module has detected a hardware failure or an
internal error and stopped the module. Additionally the eight
status LEDs light to display the error code (refer to
FACEPLATE LEDS 1 THROUGH 8
In normal operation, the IMCPM02 module uses the LEDs on
the faceplate to indicate its status. The two-color status LED
indicates the mode of the IMCPM02 module, green for execute
mode and red for failed state. When in execute mode, the
IMCPM02 module uses LEDs 1 through 8 as activity indica-
tors.
If pole 1 of dipswitch SW2 is set to 0 (EWS activity), LEDs 1
through 8 display the number of commands and replies trans-
ferred through the EWS port. The LEDs increment once for
each command, and once for each reply.
If pole 1 of dipswitch SW2 is set to 1 (CTT interface activity),
LEDs 1 through 6 display the number of messages and replies
transferred through the CTT interface. The LEDs increment
once for each message received from the CTT terminal, and
