Bfm#10 To #13: Offset Data/Bfm#14 To #17: Gain Data; Bfm#19: Data Change Prohibition Of Setting Change - Mitsubishi Electric MELSEC-FX3S Series Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U
FX -4DA (4-channel Analog Output)
3U
5.4.7

BFM#19: Data change prohibition of setting change

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).
Set value
K3030
Other than K3030
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
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).
E-26
PLC User's Manual - Analog Control Edition
3UC
Description
permits data change
disables data change
4DA.
3U-
5 Buffer Memory (BFM)
Setting range: K3030 or other than K3030
Initial value: K3030
Numeric data type: Decimal (K)
5.4 Buffer Memory Details