Mitsubishi Electronics MELSEC-F Manuel D’Utilisation
E-34
5 Buffer Memory (BFM)
5.4 Buffer Memory Details
FX
3G
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
FX
3U
-4DA (4-channel Analog Output)
3. Cautions regarding use of the output corrective function by load resistance
• While changing the settings, the output is stopped, and H0000 is automatically written in the output status
(BFM #6).
At the completion of writing, the output status (BFM #6) will automatically change to H1111, and the output
will be restarted.
At the completion of writing, the output status (BFM #6) will automatically change to H1111, and the output
will be restarted.
• This function is valid only in the voltage output mode (mode 0 or 1).
• The corrective function by load resistance is valid only at a load resistance from 1 k to 30 k
• The corrective function by load resistance is valid only at a load resistance from 1 k to 30 k
Ω.
• If a setting is out of the upper setting range, b7 of the error status BFM #29 is turned on.
• When not using this function, the output characteristics at a load resistance of 30 k
• When not using this function, the output characteristics at a load resistance of 30 k
Ω are applied.
4. Cautions regarding EEPROM writing
If data is set in BFM #0, #5, #10 to #17, #19, #32 to #35, #50 to #54 or #60 to #63, the data will be written in
the EEPROM of FX
the EEPROM of FX
3U
-4DA.
Do not turn off the power immediately after writing values in these buffer memories.
The maximum number of EEPROM rewritable times is 10,000. Therefore, when creating a program, do not
frequently write data in the above buffer memories (BFM).
The maximum number of EEPROM rewritable times is 10,000. Therefore, when creating a program, do not
frequently write data in the above buffer memories (BFM).
5.4.18 BFM #60: Status automatic transfer function setting
Initial value: H0000
Numeric data type: Hexadecimal (H)
When the bits, b0 to b2, of BFM #60 are turned on, the assigned functions (see the table below) are valid.
When the bits are turned off, the functions are invalid.
When the bits are turned off, the functions are invalid.
1. Assignment to each bit of BFM #60
2. Cautions regarding the status automatic transfer function
• While changing the settings, the output is stopped, and H0000 is automatically written in the output status
(BFM #6).
At the completion of writing, the output status (BFM #6) will automatically change to H1111, and the output
will be restarted.
At the completion of writing, the output status (BFM #6) will automatically change to H1111, and the output
will be restarted.
3. Cautions regarding EEPROM writing
If data is written to BFM #0, #5, #10 to #17, #32 to #35, #50 to #54 or #60 to #63, the data will also be written
in the EEPROM of FX
in the EEPROM of FX
3U
-4DA.
Do not turn off the power immediately after writing values in these buffer memories.
The maximum number of EEPROM rewritable times is 10,000. When creating a program, therefore, do not
frequently write data in the above buffer memories (BFM).
The maximum number of EEPROM rewritable times is 10,000. When creating a program, therefore, do not
frequently write data in the above buffer memories (BFM).
Bit No.
Description
Reference
b0
When the value of the error status (BFM #29) changes,
the status value is transferred to the data register
specified by BFM #61.
the status value is transferred to the data register
specified by BFM #61.
Subsection 5.4.10
Subsection 5.4.19
Subsection 5.4.19
b1
When the value of the upper/lower limit function status
(BFM #39) changes, the status value is transferred to the
data register specified by BFM #62.
(BFM #39) changes, the status value is transferred to the
data register specified by BFM #62.
Subsection 5.4.14
Subsection 5.4.20
Subsection 5.4.20
b2
When the value of the disconnection detection status
(BFM #28) changes, the status value is transferred to the
data register specified by BFM #63.
(BFM #28) changes, the status value is transferred to the
data register specified by BFM #63.
Subsection 5.4.9
Subsection 5.4.21
b3 to b15
Invalid (setting values unchanged)
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