
Communication extension card
-40-
COB-ID
Request
code
Object index Subindex
Requested data
Byte0
Byte1
Byte2
Byte3
Byte4 Byte5 Byte6 Byte7
0x603
0x2B
0x01
0x21
0x00
0x01
0x00
0x00
0x00
Example 2: Assume that the address of the VFD slave station is 3, and the function of setting 1 is defined as
"Set frequency". To set the frequency to 50.00 Hz (that is, setting 1=0x1388), the master station transmits
the following SDO command.
COB-ID
Request
code
Object index Subindex
Requested data
Byte0
Byte1
Byte2
Byte3
Byte4 Byte5 Byte6 Byte7
0x603
0x2B
0x00
0x21
0x03
0x88
0x13
0x00
0x00
Example 3: To read the running state of the VFD whose address is 3, the master station transmits the
following SDO command.
COB-ID
Request
code
Object index
Subindex
Requested data
Byte0
Byte1
Byte2
Byte3
Byte4 Byte5 Byte6 Byte7
0x603
0x40
0x01
0x20
0x00
0x00
0x00
0x00
0x00
If the VFD is running forward, the following SDO command is returned to the master station.
COB-ID
Request
code
Object index
Subindex
Requested data
Byte0
Byte1
Byte2
Byte3
Byte4 Byte5 Byte6 Byte7
0x583
0x4B
0x01
0x20
0x00
0x01
0x01
0x00
0x00
Example 4: Assume that the address of the VFD slave station is 3, and the function of setting 1 is defined as
"Set frequency". To set the frequency to 50.00 Hz (that is, setting 1=0x1388), the master station transmits
the following SDO command.
COB-ID
Request
code
Object index Subindex
Requested data
Byte0
Byte1
Byte2
Byte3
Byte4 Byte5 Byte6 Byte7
0x603
0x40
0x00
0x20
0x03
0x00
0x00
0x00
0x00
If the running frequency of the VFD is 50.00 Hz, the following SDO command is returned to the master
station.