Keyscan Inc. – Technical Guide (PC109x - 04.15)
Figure 53 - CIM Diagnostic LEDs - B3 - B0
CIM Boot-up
When power is applied to the CIM or the reset jumper J1 is momentarily shorted, the CIM module will
begin its boot-up sequence. The module uses the four (4) diagnostic LEDs to indicate where it is in the
boot-up sequence.
B3 – B0 Code
1 to 4 – basic initialization notices
5 (0101) – the CIM has entered NETCOMP program mode (LEDs will extinguish after approximately 1
second.)
6 (0110) – the CIM has entered ACU connection mode (The LEDs may extinguish after 1 second if the CIM
can establish communication with the ACU quickly. The CIM may stay in this mode longer if it is auto-
matching the bit rate of the ACU or is unable to communicate to the ACU via the global communication
port.)
7 (0111) – the CIM has entered CIM 0 mode (It has been set to provide PC to CANBUS communication. (If
the bit rate has been set via jumpers J9 – J11, the CIM will extinguish the LEDs after approximately 1
second. If the CIM has been set for auto-match bit rate, the LEDs may extinguish after 1 second if the CIM
can establish communication with the ACU quickly. The CIM may stay in this mode longer if it is auto-
matching the bit rate of the ACU or is unable to communicate to the ACU via the global communication
port.)
Cut View
Diagnostic LEDs
& Diagnostic Jumper J2
KI-00268E-07-12
B3 B2 B1 B0
Diag
J2
1 2 1 2 1 2 1 2
Rx - COM COM
CAN
CAN - Tx
J3
J4
J9
J12
Power
Good
J10
J11
Fault
(Flashing)
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