E-44
6 Table Output Function
6.3 Procedures for transferring data table to buffer memory
FX
3G
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
FX3U-4DA (4-channel Analog Output)
6.3 Procedures for transferring data table to buffer memory
The data table prepared in the data registers (D1000 to D7999) in the PLC or the expansion registers (R0 to
R32767) are transferred to the buffer memory in FX3U-4DA.
The transfer procedures are shown below.
1. Spe cify the head device number of the data table to be transferred. (BFM #98, initial value:
K1000)
Specify the head device number of the data table in BFM #98.
The setting range is K1000 to K7994 for the data registers (D1000 to D7999) (because at least six points are
occupied) or K0 to K32762 for the expansion registers (R0 to R32767) (because at least six points are
occupied).
Example) When the data table is set starting from D1000, set K1000 in BFM #98.
When a value out of the setting range is set, the error code K21 is stored in the table output error code BFM
#90, the number of the buffer memory, K98, that has developed the table output error is stored in BFM #91,
and b8 of the error status BFM #29 is turned on.
2. St art transferring the data table. (BFM #99, initial value: H0000)
Transfer the data table from the PLC to the FX3U-4DA using the data table transfer command (BFM #99).
• Data table transfer command
• Register type
* When a value out of the setting range is set, the error code is stored in the table output error code BFM #90,
the number of the buffer memory, K99, that has developed the table output error is stored in BFM #91, and
b8 of the error status BFM #29 is turned on.
Example) When K1000 is written in the head device number of data table (BFM #98) and H0001 is written
in the data table transfer command (BFM #99), the data table will be transferred from the data
register D1000.
Set value Transfer command
0 No processing
1 Execution of transfer of data table
Other than above
values Invalid*
Set value Register type
0Transfer of data table from data registers
(D1000 to 7999)
1Transfer of data table from expansion registers
(R0 to 32767)
Other than above
values Invalid*
Invalid*
Invalid*
Data table transfer command
Register type
H