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MELSEC-A
3 SPECIFICATION
3.6.2 CH.
digital value setting (Addresses RWwm+0
H
to RWwm+7
H
)
(1) This area is used to write the digital value for the D/A conversion from the PLC
CPU.
(2) The digital value at all channels become “0” in the following conditions:
(a) After the power is turned on, when the remote READY (RX(n+1)B) is turned
on.
(3) The digital value that may be set is a 16-bit signed binary within the setting range
which matches the output range setting.
If a value beyond the range of the digital value resolution is set, the data in Table
3.8 is applied for the D/A conversion.
In addition, the checking code is stored in the check code storage area
(addresses RWrn+0
H
to RWrn+7
H
).
Table 3.8 Available setting range of the digital value
Output Range
Available setting range
Digital value for the D/A
conversion when the value
beyond the range is set
-10 to +10V
User range setting 1
-4096 to +4095
(Practical scope: -4000 to +4000)
4096 or more: 4095
-4097 or less: -4096
0 to 5V
1 to 5V
User range setting 2
-96 to 4095
(Practical scope: 0 to 4000)
4096 or more: 4095
-97 or less: -96
3.6.3 Analog output enable/disable setting (Address RWwm+8
H
)
(1) Set whether D/A conversion is enabled or disabled per channel.
(2) Operation is performed according to the setting made for the leading edges of
initial data setting request flag (RY(n+9)).
(3) The default setting is conversion enable for all channels.
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
CH.2 CH.1
b0
Ignored
0: Conversion disable
1: Conversion enable
CH.4 CH.3
CH.6 CH.5
CH.8 CH.7
