46 5756B
Diagnostic Register Indicators
Operating indicators (READY, ACTIVE, and RUN)
The operating indicators display the current status of the
INTERBUS system. The parameter register is not used.
After the POWER-UP and self test (display: TEST...) the
controller board is ready for operation (READY bit = 1). After
that the system is parameterized over the parameterization
memory (display: BOOT...) and the INTERBUS configuration
to be addressed is selected. The system now indicates that it
is active (display: ACTV: flashing; BA LED for the device
flashes; ACTIVE bit = 1 After the system start (display: RUN,
BA LED active, RUN bit = 1) INTERBUS data cycles are run,
and the control program can be started (bits READY, ACTIVE
and RUN = 1).
Error Indication With Bus Disconnection (DETECT and BUS)
The active DETECT signal (DETECT = 1) indicates that an
error does not enable further bus operation. All outputs are
set to 0, and the diagnostic routine looks for the cause of the
error. When the cause has been identified, the DETECT bit is
reset (DETECT = 0) and the error is indicated.
CTRL = 1: Error on the controller board/hardware fault. The
parameter register shows an error code*.
BUS = 1: The error involves a remote bus or local bus
segment (consisting of a device and the
INTERBUS path in front of it).
The parameter register indicates the type of
error:
Remote bus error:
Device number of the bus terminal module
(e.g., 1.0: Bus segment 1. Device 0)
Local bus error:
Device number of the local bus device
(e.g., 1.3: Bus segment 1. Device 3)
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