OPERATION
RESET SWITCH
4 - 2
I-E96-221A
®
once for each reply sent to the CTT terminal. LED 7 displays
the status of the Controlway channel A, and LED 8 displays
the status of Controlway channel B (see Figure
.
When the IMCP02 is in the failed mode, these LEDs indicate
module error codes. If an error occurs, the IMCPM02 module
status LED turns red and LEDs 1 through 8 light up to display
the error code (refer to Table
). Note that LEDs 1 through 8
are all on when the system first starts up. This is normal. It
means that the module is not yet on-line. In diagnostic opera-
tion mode, the LEDs indicate the status of the diagnostic test
(refer to
RESET SWITCH
The reset switch resets the module. Access this switch through
the opening on the faceplate below the LEDs. Use a thin, non-
metalic object to press the switch. Press the switch once to
recover from an error condition.
ON-LINE HARDWARE DIAGNOSTICS
The IMCPM02 module provides periodic on-line testing of the
Controlway communication channels (if Controlway communi-
cation mode is enabled). If the module finds a failed channel, it
disables the failed channel. LEDs 7 and 8 indicate the status of
the Controlway communication channels A and B, if CTT ter-
minal activity is selected on SW2 pole 1. The module also per-
forms periodic ROM checksum verification.
