Bfm #62: Upper/Lower Limit Function Status Data Automatic Transfer-To Data Register Specification - Mitsubishi FX3U-4AD User Manual

FX /FX /FX PLC User's Manual - Analog Control Edition
3G 3U 3UC
FX -4DA (4-channel Analog Output)
3U
5.4.20 BFM #62: Upper/lower limit function status data automatic transfer-to data register
specification
Use this function to automatically transfer the upper/lower limit function status data (BFM #39) to the data
register specified in BFM #62.
Only when the value becomes more than the upper limit or less than the lower limit, data will be automatically
transferred from FX
the scan time of the PLC can be shortened.
1. If "BFM #62 = K201 (initial value)"
Specified data
register
D201
2. Cautions regarding upper/lower limit function status automatic transfer function setting
• If a data is already specified for the other automatic transfer functions, do not specify the same data
register.
• This function is valid by turning on b1 of the status automatic transfer function setting (BFM #60).
• When a value out of the above setting range is set, b9 of the error status BFM #29 is turned on.
• The data set in BFM #62 will be retained in the EEPROM.
3. Cautions regarding EEPROM writing
If data is set in BFM #0, #5, #10 to #17, #32 to #35, #50 to #54 or #60 to #63, the data will be written in the
EEPROM of FX
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).
E-36
-4DA to the PLC. For this reason, the PLC does not need the program to read data, and
3U
→ For a detailed description of the upper/lower limit function status (BFM #39),
Value of upper/lower limit function status (BFM #39)
-4DA.
3U
Description
5 Buffer Memory (BFM)
5.4 Buffer Memory Details
Setting range: 0 to 7999
Initial value: K201
Numeric data type: Decimal (K)
refer to Subsection 5.4.14.