Dressler CESAR 1312, User Manual

Page: 94 / 194

4-60 Communication Interfaces CESAR 1312 (E)
Dressler
®
HF-Technik GmbH
FC23 Response Packet
Table 4-13 describes the bytes contained in an FC23 response packet.
Table 4-13. Packet format for FC23 response
Byte
Numbers
Purpose Response Value
0 and 1 Transaction ID Not used (value is copied from send
packet)
2 and 3 Protocol ID 0
4 and 5 Number of
bytes following Count of bytes in packet, starting with
byte 6
6 Unit ID 0 (copied from send packet; denotes the
default AE Bus address)
7 Function code 23 = 0x17h
8 Byte counter Not used
9 AE Bus
command
number AE Bus command number; see Table 4-
16 on page 4-63 for a complete list of
commands
10 Number of
bytes in AE
Bus response
packet Total number of bytes in the AE Bus
packet; for a description of the AE Bus
packet, see
“AE Bus Protocol” on
page 4-45 ; for information on the number
of data bytes in each AE Bus command,
see
Table 4-16 on page 4-63
11 and up AE Bus data
bytes Data bytes contained in the AE Bus
packet; for a description of the data bytes
for each command, see
“Host Port
Commands” on page 4-61 .
Note: Modbus word swapping does not
affect the order of these bytes.
These bytes are ordered as
necessary for the AE Bus
command (least significant bytes
first).