I/O Block
WBPEEUI240751C0 7 - 3
operating mode status codes. Refer to Table 8-3 for additional
status codes, both normal and error.
Block Power
The block power indicators (A and B) give a good or bad status
indication for the redundant 24 VDC block logic power inputs
to the block.
The status indicator on indicates a good power input. The
inputs are tested after their front panel fuses, which means a
bad input indication could be a blown fuse, bad connection, or
Table 7-1. Operating Mode - Normal and Fault LEDs
Indicator State Description
Normal On Operational and online.
Flashing Established communication but not initialized or
configured.
Configured and operational but lost communica-
tion with the controller.
Off No power. If this condition exists, no front panel
LEDs will be on.
Communication not established with controller for
the first time.
Fault condition exists (with FA UL T indicator on).
Fault On CPU halted (with status code given in eight status
LEDs).
Machine fault timer expired. Refer to
Machine
Fault Timer
in Section 3 for a descr iption.
Stop/reset button activated.
Off No fault condition.
Table 7-2. Normal Operating Mode St atus Codes
LED Status Condition
––––––––Initializing
123456––Normalstop
––––––7–Configurationdownloaded
– – – – – – – 8 Normal operation (backup I/O module)
– – – – – – 7 8 Normal operation (primary I/O module)
NOTE:–=LEDoff.
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