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3. SPECIFICATIONS MELSEC-A
3-11
3.5.2 Functions of the I/O signals
Functions of the I/O signals of the AJ65BT-64DAV/DAI are shown in Table 3.5.
Table 3.5 Descriptions of the I/O signals
Device number Signal Name Description
RX (n+1) 8
Initial data
processing request
flag
After the power is turned on or after the hardware reset, the initial data
processing request flag is turned on by the AJ65BT-64DAV/DAI in order to
request the initial data setting. It is turned off when the initial data setting
is complete (i.e. initial data processing complete flag RY(n+1)8 is turned
on).
RX (n+1) 9
Initial data setting
complete flag
When there is an initial data setting request (i.e. RY(n+1)9 is turned on), it
is turned on by the initial data setting completion. When the initial data
setting request flag is turned off after the initial data setting completion, the
initial data setting complete flag is also turned off.
RX (n+1) A Error status flag
This is turned on when an error other than the WDT error occurs on the
AJ65BT-64DAV/DAI.
RX (n+1) B Remote READY
This is turned on when the initial data setting is complete and the
AJ65BT-64DAV/DAI is in the READY status, after the power is turned on or
after the hardware reset. It is turned off during the test mode.
(This is used to interlock the read and write from the master module.)
RYn0
to
RYn3
CH.
analog output
enable/disable flag
These are the analog value output enable signals for channels 1 through 4.
The analog output value from the corresponding channel is enabled when
turned on.
Turn it off to prohibit the output of the analog value.
RYn4
Offset/gain value
selection
"User settings" or "factory settings" of the offset and gain values are
selected by switching the RYn4. To select the factory setting, keep the
RYn4 set to on.
RY (n+1) 8
Initial data
processing complete
flag
After the power is turned on or after the hardware reset, the initial data
processing is executed by the initial data processing request, and this flag
is turned on after the processing is completed.
RY (n+1) 9
Initial data
processing request
flag
Turn this on to set or modify the initial data.
RY (n+1) A
Error reset request
flag
When the error reset request flag (RY(n+1)A) is turned on, the error status
flag (RX(n+1)A) is turned off and the error code of the remote register write
area is cleared (0000
H).
The ON and OFF timing of each flag for the initial data processing request, processing complete,
setting complete, and the setting request by the AJ65BT-64DAV/DAI: