Omron CJ1W-SCU32 Operation Manual page 362

A Standard System Protocol
Variable Area Write
(Sequence No. 611 (Hex 0263))
This sequence writes the contents of the specified number of elements from the address of the speci-
fied variable type to the specified node number.
Send Data Word Allocation (3rd Operand of PMCR(260))
First word of
send data
Offset
+0 Number of send data words
+1 (Undefined)
+2 Variable type
(2 digits hex)
+3 First write address (6 digits BCD)
+4 Number of elements (4 digits BCD)
+5 Number of bytes to write (4 digits hex)
+6 Write data
on
Set the number of bytes to write to twice the number of send data in memory. This is necessary
because the data is converted to ASCII data before being written. When hexadecimal data is con-
verted 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 rightmost word and the data is sent starting from the send data word with the
largest offset. This is done because user programs handle data in 2-word (4-byte) units.
Send data words
0 0 0
4
0 0 0
3
0 0 0
2
0 0 0
1
Receive Data Word Allocation (4th Operand of PMCR(260))
Receive data
storage words
Offset
+0 Number of receive data words
+1 Response code (4 digits hex)
R-28
Number of send data words
+0
(Undefined)
+1
Node No.
+2
Variable type
+3
First write address
+4 Number of elements
+5
Number of bytes to write
+6
Write data
on
Contents (data format)
Node No.
(2 digits BCD)
Send frame
3
1 2
2
0 0 0 0 0 0 0 1
1
0
+0
Number of receive data words
+1
Response code
Contents (data format)
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
0007 to 00FA hex (7 to 250 decimal)
00 to 99
Set the area type (2 digits) and the first write address (6
digits). The leftmost byte of the first write address speci-
fies the address and the rightmost byte specifies the bit
location. Set the rightmost byte to 00 when bit access is
not required.
Set the number of elements to write.
Set the number of bytes to send in the communications
line.
Note: The data is converted to ASCII in the communica-
tions line, so the number of data bytes is doubled from
S+6 and onwards.
Set the data to write from the first write address.
3 4
0 0 0 2 0 0 0 3
Always 0002 hex (2 decimal)
The CompoWay/F command response code is
stored in hexadecimal code.
Data
Data