3. SPECIFICATIONS
MELSEC-A
3-17
3.8.4
Conversion enable/disable designation
Conversion may be enabled or disabled for each channel individually.
The setting of the conversion is made through the CH.
conversion enable flags (RYn0 to RYn7).
Setting Description
ON
Wire breakage detection is conducted at the same time the temperature of the target object is taken.
OFF
Neither temperature detection nor wire breakage detection is conducted.
AJ65BT-68TD
ON
RYn0
RYn1
RYn2
RYn3
to
ON
OFF
OFF
265
RWrn
RWrn+1
RWrn+2
RWrn+3
to
to
to
1032
0
0
356
RWrn+8
RWrn+9
RWrn+10
RWrn+11
to
1532
0
0
Enables conversion
for CH. 1
Enables conversion
for CH. 2
Disable conversion
for CH. 3
Disable conversion
for CH. 4
CH. 1 scaling value
CH. 2 scaling value
CH. 3 scaling value
CH. 4 scaling value
CH. 1 detected temperature
value
CH. 2 detected temperature
value
CH. 3 detected temperature
value
CH. 4 detected temperature
value
Remote I/O signal
Remote register
(1) Relationship between conversion enable/disable designation and sampling time
By disabling conversion at the channels not in use, sampling time may be reduced.
<If all channels are conversion enabled>
45 ms × 8 channels = 360 ms (= sampling time)
<If only one channel is conversion enabled>
45 ms × 1 channel = 45 ms (= sampling time)
(2) Changes caused by switching conversion enable/disable designation
<When changed from conversion disabled
→
enabled>
Sampling of the enabled channels will be commenced.
After the detected temperature values are stored in the remote register, the conversion
completion flag is turned on for the corresponding channel.
<When changed from conversion enabled
→
disabled>
Sampling of the disabled channels will be stopped.
The conversion completion flag is turned off for the corresponding channel.
For the detected temperature value stored in the remote register, the data immediately prior to
the disable setting will be retained.
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