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Advanced Energy
Table 4‑14. Packet format for FC23 send (Continued)
Byte
Numbers
Send Value
Purpose
8 and 9
Reference number 0xFFFF
for read
☞ Important
This value is necessary to denote the
special use of FC23 (mapping to AE
Bus commands).
10 and 11
Word count
12 and 13
Reference number 0xFFFF
for write
☞ Important
This value is necessary to denote the
special use of FC23 (mapping to AE
Bus commands).
14 and 15
Word count for
write
Not used
16
Byte count for
write
Not used
17
AE Bus command AE Bus command number
number
18
Number of data
bytes in AE Bus
write packet
Not used
Total number of data bytes in the packet
☞ Important
In AE TCP, the AE Bus packet does
not use the header and checksum bytes.
For a description of the AE Bus packet,
see the AE Bus protocol..
For information on the number of data bytes in
a command, see the AE host command set.
19 and up
AE Bus data
bytes
Data bytes contained in the AE Bus packet
For information on the number of data bytes in
a command, see the AE host command set.
Modbus word swapping does not affect the
order of these bytes. These bytes should be
ordered according to the AE Bus command
format (least significant bytes first).
FC23 Response Packet
Table 4‑15. Packet format for FC23 response
Byte
Numbers
0 and 1
4‑46
Send Value
Transaction ID
Purpose
Not used (value is copied from send packet)
Communication Controls
57023915-00A