7-8
Chapter 7 EPS with IDNet 2
Troubleshooting (continued)
SLC Channel
Trouble LED
Codes
SLC Channel troubles are indicated by LEDs A to E, as well as LEDs CH1, CH2, and CH3.
The channel LEDs, CH1, CH2, and CH3 indicate the channel which is experiencing the
trouble. For example, if the CH1 LED is lit, the trouble is occurring on SLC channel 1.
The lettered LEDs, A to E, describe the trouble.
Table 7-6. SLC Channel Trouble LED Codes
CH1 CH2 CH3 A B C D E
Description:
IDNAC Channel Fail: The channel is not
responding.
IDNAC Short Circuit: There is a short circuit on
the channel.
IDNAC Duplicate Device: There are 2 devices on
the channel that have the same address.
IDNAC Missing device: There is a device
programmed on the channel that it cannot detect.
IDNAC Extra Device: The channel is detecting the
address of a device that has not been programmed.
IDNAC Wrong Device: The channel is detecting a
device that had been programed as the wrong
“type”.
IDNAC Controller Fail: The channel can no longer
detect the controller.
IDNAC Address Out of Range: There is a device
with an unsupported address on the channel.
IDNAC Isolator Trouble: An isolator on the
channel is open.
IDNAC Overcurrent: A device on the Channel is
drawing too much current.
IDNAC Earth Trouble: There is a positive or a
negative earth fault on the channel.
Unassigned
Unassigned
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