Mitsubishi Electric MELSEC-FX3S Series - BFM#10 to #13: Offset Data;Bfm#14 to #17: Gain Data; BFM#19: Data Change Prohibition of Setting Change

E-26
5 Buffer Memory (BFM)
FX 3S /FX 3G /FX 3GC /FX 3U /FX 3UC PLC User's Manual - Analog Control Edition
FX3U-4DA (4-channel Analog Output)
5.4 Buffer Memory Details
5.4.7 BFM#19: Data change prohibition of setting change
Setting range: K3030 or other than K3030
Initial value: K3030
Numeric data type: Decimal (K)
Setting in the following buffer memory areas is prohibited.
• BFM#0 (output mode setting Output mode setting)
• BFM#5 (output setting upon PLC stop)
• BFM#9 (offset/gain setting value write command)
• BFM#10 to #13 (offset data)
• BFM#14 to #17 (gain data)
• BFM#20 (initialization function)
• BFM#32 to #35 (data to be output upon PLC stop)
• BFM#38 (upper/lower limit function setting)
• BFM#41 to #48 (upper and lower limit values of upper/lower limit function)
• BFM#50 (corrective function setting by load resistance)
• BFM#51 to #54 (load resistance values)
• BFM#60 (status automatic transfer function setting)
• BFM#61 (Error status data automatic transfer-to data register specification)
• BFM#62 (Upper/lower limit function status with automatic transfer to specified register specification)
• BFM#63 (Disconnection detection status with automatic transfer to specified data register specification)
Specify the following value as the setting change prohibition mode (BFM#19).
1. Cautions regarding setting of the setting change prohibition mode
• While changing the setting value, 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.
2. 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
3U-4DA.
Do not turn off 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).
Set value Description
K3030 permits data change
Other than K3030 disables data change