387
CompoWay/F Master Protocol Appendix B
The received frames are stored in order from the leftmost word to the rightmost word of the I/O memory
address.
Parameter Area Write
(Sequence No. 616 (Hex 0268))
This sequence writes the contents of the specified number of elements from the address of the specified
parameter area to the specified node number.
Send Data Word Allocation (3rd Operand of PMCR(260))
Set the number of write bytes to twice the of the actual number of send data bytes. This is necessary because
the data is converted to ASCII data before being written. When hexadecimal data is converted to ASCII data,
data in the first write address +0 and +1 is stored in I/O memory in order from the leftmost word to the rightmost
word and the data is sent starting from the send data word with the largest offset. This is done because ladder
programming handles data in 2-word (4-byte) units.
1 2 3 4
5 6 7 8
Receive data words
Receive frame
"12" "34" "56" "78"
Rightmost word
Leftmost word
Offset Contents (data format) Data
+0 Number of send data words 0007 to 00FA Hex (7 to 250 decimal)
+1 (Undefined) Node No.
(2 digits BCD)
00 to 99
+2 Parameter type (4 digits hex) Set the parameter type.
+3 First write address (4 digits hex) Set the first write address.
+4 Number of elements
(4 digits hex)
Set the number of elements to write.
(The leftmost bit in the number of elements
is always 1.)
+5 Number of bytes to write
(4 digits hex)
Set the number of bytes of write data to
send in hexadecimal code.
+6
on
Write data Set the data to write from the first write
address.
Write data
First word of
send data
Number of send data words
+0
+1
+2
+3
(Undefined)
Node No.
+4
Number of bytes to write
+5
Parameter type
First write address
Number of elements
+6
0003
0002
0001
0000
4
3
2
1
0000 0001 0003
1 2 3 4
000 2
Send data words
Send frame