Omron SYSMAC CJ1W-SCU41-V1

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Communications Frames Section 6-8
Response Frame
[CMND S D C]
Command Details
Response
Number of write data registers
(e.g, 1 register)
0001
hex
Set 0001 hex in controller data s+3 of
CMND(490).
Number of attached data registers
Note: Set 02 hex of this value in
the leftmost byte of S+4. Set 00
hex as the leftmost register No. in
the rightmost byte of S+4.
0200
hex
Set 0200 hex in controller data s+4 of
CMND(490).
Register No. 0002 hex data (e.g.,
0064 hex)
Note: Set 64 hex as the rightmost
register No. in the leftmost byte of
S+5.
6400
hex
Set 6400 hex in controller data s+5 of
CMND(490).
Item Set
value
Setting location
Item Setting Setting location
Modbus Slave address (e.g., 02 hex) 02 hex Stored in D+2 of CMND(490)
FUNCTION code: Write data (= 10 hex) 10 hex
Write data register No. (e.g., frequency reference = 0002 hex) 0002 hex Stored in D+3 of CMND(490)
Write data registers (e.g., 1 register) 0001 hex Stored in D+4 of CMND(490)
Operand Offset Value Meaning
S:
D01000
+0: 2804 hex Conversion to Modbus-RTU (FINS command code: 2804 hex)
+1: 0210 hex Modbus-RTU slave address: 02 hex, FUNCTION code: 10 hex (DATA WRITE)
+2: 0002 hex Write data register No.: 0002 hex (frequency reference)
+3: 0001 hex Number of write data registers: 0001 hex (1 register)
+4: 0200 hex Number of attached data bytes: 02 hex (2 bytes); Leftmost register No.: 00 hex
+5: 6400 hex Rightmost register No.: 64 hex (Frequency reference value: 10.0 Hz when unit is 0.1
Hz), blank = 00 hex
D:
D02000
First response storage word
C:
D00000
+0: 00 0C hex Number of command data bytes: 000C hex (12 bytes decimal)
+1: 00 0A hex Number of response data bytes: 000A hex (10 bytes decimal)
+2: 0002 hex Send destination network address: 02 hex; Serial port number: 0 hex (direct serial port
unit address specification)
+3: 058C hex Send destination node address: 05 hex; Send destination unit address: 8C hex
+4: 0000 hex Response required; Communications port number: 0; Resends: 0 hex
+5: 0000 hex Response monitoring time: 2 s
Operand Offset Value Meaning
D:
D02000
+0: 2804 hex Conversion to Modbus-RTU (FINS command code: 2804 hex)
+1: 0000 hex FINS end code: 0000 hex (normal)
+2: 0210 hex Modbus-RTU slave address: 02 hex, FUNCTION code: 10 hex (DATA WRITE)
+3: 0002 hex Write data register No.: 0002 hex (frequency reference)
+4: 0001 hex Number of write data registers: 0001 hex (1 register)