Bfm#20: Initialization Function (Resetting To Factory Default Status) - Mitsubishi Electric FX3G User Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U 3UC
FX -4DA (4-channel Analog Output)
3U
5.4.8

BFM#20: Initialization function (resetting to factory default status)

When K1 is set in BFM#20, all functions and all buffer memory (BFM#0 to #3098) will be initialized to the
default status.
When BFM#20 is not K0 or K1, this function is invalid. (The settings will not be changed, and the functions will
not be initialized.)
1. Cautions regarding initialization function
• During initialization, output is stopped, and H0000 is automatically written in the output status (BFM#6).
At the completion of initialization, the output status (BFM#6) will automatically change to H1111, and
output will be restarted.
• It takes approximately 5 seconds to initialize all the data. Do not set (write) data in the buffer memory
during this period.
• Priority is given to the setting of the value change prohibition mode (BFM#19).
• At the completion of initialization, the value of BFM#20 will automatically change to K0.
5.4.9 BFM#28: Disconnection detection status (only in current output mode)
When a wire-break is detected, the bit corresponding to the relevant channel will turn on.
1. Assignment to each bit of BFM#28
Bit No.
b0
b1
b2
b3
b4 to b15
2. Cautions regarding use of disconnection detection status
• When any of b0 to b3 is turned on, b11 of the error status (BFM#29) is turned on.
• The disconnection detection status is valid only if the output mode (BFM#0) is the current output mode
(mode 2 to 4). In other output modes, each corresponding bit of BFM#28 stays off.
• The disconnection detection status data automatic transfer function is not supported when connected and
used with the FX5U or FX5UC CPU module.
3. Disconnection detection status automatic transfer function (b2 of BFM#60)
If the disconnection detection status with automatic transfer-to data register is specified in BFM#63, the data
in BFM#28 can be transferred to the specified data register.
Only when wire-break is detected, data will be automatically transferred from FX
reason, the PLC does not need the program for reading data, and the scan time of the PLC can be shortened.
→ For a detailed description of the status automatic transfer function, refer to Subsection 5.4.18.
PLC User's Manual - Analog Control Edition
Description
Wire-break in channel 1
Wire-break in channel 2
Wire-break in channel 3
Wire-break in channel 4
Not used
5 Buffer Memory (BFM)
5.4 Buffer Memory Details
Setting range: K0 or K1
Initial value: K0
Numeric data type: Decimal (K)
Initial value: H0000
Numeric data type: Hexadecimal (H)
-4DA to the PLC. For this
3U
A
B
C
D
E
F
G
H
I
J
E-27