Spectrum Controls 1746sc-NI8u - Manual (Page 76)

64 SLC 500 ™ Universal Analog Input Module
bit (bits 12-15 of the channel status word). Channel fault bits and LEDs
are self-clearing when fault conditions are corrected.
Important: If you clear the channel enable bit, channel status bits are
reset.
LED Indicators The module has nine LEDs:
• eight channel-status LEDs, numbered to correspond with each channel
• one module-status LED
Module
Channel
Status
Universal Analog
0
1
4
5
INPUT
2
3
6
7
LED for Module Status
LEDs for Channels 0-7
LED Troubleshooting Tables
Table 6.1 Module-status LED
If Module
Status LED is: Then: Take this Corrective Action:
On The module is OK. No action required.
Off The module is turned off, Cycle power. If the condition persists,
or it detected a module call your local distributor or Spectrum
fault. Controls for assistance.
Table 6.2 Module-status and Channel-status LED
If Module
Status
And Channel Then: Take this Corrective Action:
LED is: Status LED is:
On The channel No action required.
is enabled.
Blinking The module Examine error bits in status word
detected: if bit 12=1, the input has an open circuit
On open-circuit condition if bit 13=1, the input value is under range
under-range condition if bit 14=1, the input value is over range
over-range condition if bit 15=1, the channel has a diagnostic
channel error or channel error
Off The module is in No action is required.
power up, or the
channel is disabled.