Instruction Manual

5-23
- IV Series User’s Manual (Field Network) -
Data allocations in the data I/O communication
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Command Status Bits Address 2 to 3: Handshake control/status/error result
The Bits at Address 2 to 3 of the Command Status Bits have the following functions:
Address Bit Item Content Data content
2
0 Result available
This bit is output when the
status result can be acquired.
0 : The status result
cannot be acquired.
1 : The status result
can be acquired.
1 Result update complete
This bit switches the ON/OFF
statuses when the status result
is updated.
0 <=> 1:
The statuses will
be switched when
the status result is
updated.
2 BUSY
This bit is output when the unit
is unable to accept new trigger
inputs, such as while performing
imaging, processing a judgment,
registering an external master
image, switching programs, etc.
0 : The unit is not in
busy status.
1 : The unit is in busy
status.
3 Imaging
This bit is output while the unit
is performing imaging operation.
0 : The unit is not
performing imaging
operation.
1 : The unit is
performing imaging.
4 RUN
This bit is output when the unit
is “RUN” and no system errors
have occurred.
0 : The unit is not in
operation.
1 : The unit is
operating normally.
5 Ready
This bit is output when the
start-up sequence of this unit
completes after power-on.
0 : The start-up has
not completed yet.
1 : The start-up has
completed.
6 to 7 Reserved by system --- ---
3
0 to 4 Reserved by system --- ---
5 Buffer overrun status
If handshake control is [Enabled],
this bit is output when an overrun
of the status result has occurred.
0 : No buffer overrun
has occurred.
1 : The buffer is in
overrun status.
6 Warning status
This bit outputs the warning
status of the unit.
0 : The unit is not in
warning status.
1 : The unit is in
warning status.
7 Error status
This bit outputs the error status
of the unit.
0 : The unit is not in
error status.
1 : The unit is in error
status.
5
Data I/O communication