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5 Buffer Memory (BFM)
5.4 Buffer Memory Details
A
Common Items
B
FX
3U
-4AD
FX
3UC
-4AD
C
FX
3U
-4AD-ADP
D
FX
3G
-2AD-BD
E
FX
3U
-4DA
F
FX
3U
-4DA-ADP
G
FX
3G
-1DA-BD
H
FX
3U
-3A-ADP
I
FX
3U
-4AD-PT
-ADP
J
FX
3U
-4AD-PTW
-ADP
FX
3G
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
FX3U-4DA (4-channel Analog Output)
5.4.4 BFM #6: Output status
Initial value: H0000
Numeric data type: Hexadecimal (H)
The output status information of channel 1 to 4 is stored.
* The output conditions conform to the output setting upon PLC stop (BFM #5).
1. Cautions regarding use of output status
• The output status setting is valid only if the PLC is running.
When the PLC is stopped, H0000 is automatically written.
• When the setting in any of the following buffer memory areas is changed, output updating is stopped.
H0000 is automatically written in BFM #6.
• BFM #0 (Output mode setting)
• BFM #5 (Output setting upon PLC stop)
• BFM #9 (Offset/gain setting value write command)
• BFM #19 (Setting change prohibition)
• BFM #20 (Initialization function)
• BFM #32 to #35 (Data to be output from each channel upon PLC stop)
• BFM #50 (Corrective function setting by load resistance)
• BFM #51 to #54 (Load resistance for each channel)
• 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 data register)
• BFM #63 (Disconnection detection status with automatic transfer to data register specification)
• BFM #99 (Data table transfer command)
Value status (HEX) Description
0 Output updating is stopped.*
1 Under output updating
H
ch4
ch3
ch2
ch1