Bfm#50: Setting Of Output Corrective Function By Load Resistance; (Only In Voltage Output Mode)/Bfm#51 To #54: Load Resistance Values - Mitsubishi Electric MELSEC-FX3S Series Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U 3UC
FX -4DA (4-channel Analog Output)
3U

5.4.17 BFM#50: Setting of output corrective function by load resistance

(only in voltage output mode)/BFM#51 to #54: Load resistance values

The output characteristics of FX
When the load resistance is 1 kΩ, the output deviation is approx. -4.3 % to 20 V in full scale, whereas the
output deviation is approx. 0.15 % to 20 V in full scale when the load resistance is 1 MΩ. When the load
resistance is 30 kΩ or less (1 kΩ to 30 kΩ), the deviation of the output characteristics can be corrected by
specifying the output corrective function (BFM#50) and the load resistance values (BFM#51 to #54).
Analog value
+10V
-32000
1. Setting of output corrective function (BFM#50)
The corrective function by load resistance is valid or invalid by writing a 4-digit hexadecimal number,
H, in the output corrective function setting (BFM#50).
H
ch4
ch3
Set value
0
1
Other than above values
2. Setting range and initial value of load resistance (BFM#51 to #54)
Set the load resistance value for each channel allocated to the following BFM.
BFM
number
#51 Load resistance value for channel 1
#52 Load resistance value for channel 2
#53 Load resistance value for channel 3
#54 Load resistance value for channel 4
PLC User's Manual - Analog Control Edition
Numeric data type: BFM#50: Hexadecimal (H), BFM#51 to #54: Decimal (K)
-4DA have been adjusted at 30 kΩ load resistance as a factory default.
3U
The deviation of output characteristics is
corrected by the corrective function by load
resistance.
32000
Digital value
: Output characteristics after correction
-10V : Output characteristics before correction
ch1
ch2
Corrective function by load resistance is invalid.
Corrective function by load resistance is valid.
Invalid (setting values unchanged)
Description
Initial value: BFM#50: H0000, BFM#51 to #54: K30000
Description
Setting range (Ω)
1000 to 30000
5 Buffer Memory (BFM)
5.4 Buffer Memory Details
Initial value (Ω)
30000
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