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Command Processing
2.7 LED Display
Table 2.7 lists the items displayed by the IDD READY LED.
Active state (power
condition)
Active_Wait or Stopped
state (power condition)
Motor being started or
stopped (*1)
Formatting in progress (*1)
*1)
These display items take priority over display items caused by power
conditions. Even if a command is received while "Motor being started or
stopped," or "Formatting in progress" is displayed, the LED display stays
unchanged.
2.8 Command Processing Exceptions
2.8.1 Overlapping commands
The IDD recognizes that commands have been overlapped when it receives a
command with the same tag from the same INIT as a command being executed or
held in its queue, and abnormally terminates command processing.
The execution of a command ends when the TARG reports RESPONSE to the
INIT. The execution of a command is also terminated with ABORT TASK,
ABORT TASK SET, CLEAR TASK SET, LOGICAL UNIT RESET or HARD
RESET.
2-14
Table 2.7 LED display
Mode Page 19 Ready LED Meaning
0
a) On when a command
is not being executed.
b) Flashes when a
command is being
executed (in 50 ms
intervals).
a) Off when a command
is not being executed.
b) Flashes when a
command is being
executed (in 50 ms
intervals).
Flashes (in 0.5 s intervals)
Flashes (in 1.0 s intervals)
1
a) Off when a command
is not being executed.
b) Flashes when a
command is being
executed (in 50 ms
intervals).
C141-C009
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