Diagnostics; Psm Module Led Indicators; Psm Module Health Status - GE PACSystems RX3i User Manual

Chapter
4

PSM Module LED Indicators

PSM Module Health Status

GFK-2749

Diagnostics

For details on the system status information provided by the LEDs, refer to page 1-2.
The %I offset 1 bit is a PSM heartbeat. It toggles every RX3i Controller scan as an
indication that the PSM module is communicating with the CPU.
The %I offset 2 bit is set to 1 when both cables between the PSM module and the
Terminal Assembly are installed correctly. This means:

GRID1 on the Terminal Assembly is connected to GRID 1 on the PSM module

GRID2 on the Terminal Assembly is connected to GRID 2 on the PSM module

The same voltage range is used for these connections.
Under special installations, the user can use a different arrangement but then must ignore
this indication.
%I offset 8 bit is the "new data" bit that indicates this is the first PLC scan where this
power data is available.
The remaining %I status bits indicate alarms, ANSI functions and signal quality
information. For the functions of the %I bits, refer to "PSM Status Flags" in chapter 3.
4-1