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Details
■Write
When a Write request (remote buffer memory address: 1203H) is requested (1), writing data 0 (remote buffer memory
address: 1204H) to writing data 383 (remote buffer memory address: 1383H) are written, according to the number of words
set for the write size (remote buffer memory address: 1202H), starting with the FPGA register that was set as the write start
address (remote buffer memory address: 1200H, 1201H).
Remote buffer memory
(word address)
1200H
Write start address
1201H
1202H
Write size
1203H
Write request
1204H
Writing data (0 to 383)
·
1383H
Remote buffer
Address
memory
Write start address
1200H, 1201H
Write Size
1202H
Write request
1203H
Writing data 0 to
1204H to
writing data 383
1383H
Write start address
specification
Write size specification
Write request
Description
Sets the start address (byte address) of the target FPGA register. Set an even address.
If an invalid address is set as the write start address and the write request is set to 1 (requested), a "Write start
address out-of-range error" occurs, Error status flag (RXA) turns on, and the ERR. LED flashes. In this case, writing
data 0 to writing data 383 are not written to the FPGA register areas. The following are invalid addresses.
• Odd-numbered address
• Address of non-writable FPGA register
Set the size (in word units) to be written to the FPGA register areas among writing data 0 to writing data 383 in the
remote buffer memory. The number of words of data specified by the write size starting from writing data 0 in the
remote buffer memory is written to the FPGA register specified by the write start address. The settable range is 1 to
384 words.
If the write size is invalid, an "FPGA register write size out-of-range error" will occur, Error status flag (RXA) will turn
on, and the ERR. LED flashes. In this case, writing data 0 to writing data 383 are not written to the FPGA register
areas. The following are incorrect sizes.
• A value other than 1 to 384
• When non-writable FPGA register areas are included in the write range
When the write request is set to 1 (requested), Writing data 0 to Writing data 383 of the remote buffer memory are
written starting from the FPGA register specified by the write start address and the number of words specified by
the write size.
When writing to the FPGA register areas is completed, the execution result is stored in the write request.
0: When completed successfully
-1: When completed with an error
Sets the data to write to the FPGA register areas.
FPGA register
(byte address)
Write area
12.6 FPGA Register Access Function
12
12 FUNCTIONS
325
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Troubleshooting
