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MELSEC-Q
3 SPECIFICATIONS
(2) Output signals
Device No. Signal name Description
Y1 to Y8
CH Output
enable/disable flag
(1) Specifies whether to output the D/A converted value or offset value for each
channel.
on: D/A converted value off: Offset value
(2) The D/A conversion speed is constant regardless of whether the output
enable/disable flag is on or off.
Y9
Operating
condition setting
request
(1) This turns on when the contents of D/A conversion enable/disable are validated.
(2) Refer to the X9 column for the on/off timing.
YA
User range writing
request
[In offset/gain setting mode]
(1) This turns on when the values for the adjusted offset/gain settings are registered in
the D/A converter module.
(2) Refer to the XA column for on/off timing.
Refer to Section 4.6 for offset/gain settings.
[In normal mode]
(1) Turn on this signal when restoring the user range.
(2) Refer to the XA column for the on/off timing.
Refer to Chapter 7 for the user range restoration.
YB
Channel change
request
(1) This turns on when changing the channel for which offset/gain settings are to be
performed.
(2) Refer to the XB column for the on/off timing.
YC
Set value change
request
(1) This turns on/off when increasing or decreasing the analog output value during
adjustment of the offset/gain settings.
(2) The analog output is either increased or decreased based on the value that was
set in buffer memory address 24 (Un\G24).
YD
Synchronous
output request
(1) While in the synchronous output mode, D/A conversion is performed and the
analog value is output at the timing when Synchronous output request (YD) is on.
YF Error clear request
(1) This turns on when a write error is cleared.
(2) Refer to the XF column for on/off timing.
POINT
When User range writing request (YA) is turned on with D/A conversion enabled in
the normal mode, the D/A converter module restores the user range.
User range writing request (YA)
Restoration processing
Conversion enable/disable
Restoration completed
During conversion disable
During conversion
enable
During
restoration
Offset/gain setting mode
flag (XA)
Operating condition setting
completed flag (X9)
Operating condition setting
request (Y9)
During restoration: D/A conversion disable
After restoration : D/A conversion processing can be executed in the restored user range
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