CAN-8123/CAN-8223/CAN-8423 user’s manual (Revision 3.00, May/22/2009) ------
165
Step 11. Although the AI input value has been changed according the AO value,
the RxPDO will not automatically reply in the CAN-8423. Therefore, users
have to use the RTR message from the 2nd TxPDO to read back the AI value.
11-bit COB-ID (bit)
Func Code
Node ID
8-byte Data (byte)
10 9 8 7 6 5 4 3 2 1 0
RTR
Data
Length
0
1
2
3 4 5 6 7
0 1 0 1 0 0 0 0 0 0 1
1
0
00 00 00
00
00 00 00
00
PDO
consumer
PDO consumer
(CAN-8123/CAN-8223/
CAN-8423)
COB-ID
: 0x281
Step 12. The feedback value for AI is 5V.
11-bit COB-ID (bit)
Func Code
Node ID
8-byte Data (byte)
10 9 8 7 6 5 4 3 2 1 0
RTR
Data
Length
0
1
2
3 4 5 6 7
0 1 0 1 0 0 0 0 0 0 1
0
8
FF 7F FF
FF
FD FF FF
FF
PDO
consumer
PDO consumer
(CAN-8123/CAN-8223/
CAN-8423)
COB-ID
: 0x281
L
: 8
PDO-msg
: FF 7F FF FF FD FF FF FF
The feedback AI0 value is 0x7FFF, i.e. this value is in max limit for
the range. The AI0 value will still be 5V, even the input 7V is over the
max input range,