Spectrum Controls 1746sc-NI8u - Manual (Page 78)

66 SLC 500 ™ Universal Analog Input Module
Channel Error (Bit 15)
The module sets this fault bit when it detects any of the following:
Configuration erorrs:
- configuration bits Data Format definition, invalid Input Types for
channels 0 through 3: 10010 - 11101
- configuration bits Data Format definition of Engineering Units x 1 for
Input Types of ±500mV, 0-5V, 1-5V, 0-10V, ±10V, 0-20mA
- configuration bits where Open Circuit is enabled with Input types of 0-
5V, 1-5V, 0-10V, ±10V, or 0-20mA
- invalid data acquisition of an input channel
- the filter frequency selected for the valid channel currently fails
autocalibration range checks
Module Status LED (Green)
The module-status LED indicates when the module detects a
nonrecoverable fault at power up or during operation. For this type of
fault, the module:
• no longer communicates with the SLC processor
• disables all channels
• clears all data and status words
A module failure is non-recoverable and requires the assistance of your
local distributor or Spectrum Controls.
Interpreting I/O Error
Codes
I/O error codes appear in word S:6 of the SLC processor status file. The
first two digits of the error code identify the slot (in hexadecimal) with the
error. The last two digits identify the I/O error code (in hexadecimal).
The error codes that apply to your module include (in hexadecimal):
• 50–5E
• 71 (watchdog error)
• 90–94
For a description of the error codes, refer to the Allen-Bradley Advanced
Programming Software (APS) Reference Manual, Allen-Bradley
publication 1746-6.11.