ASTRO VG-871 - Type 6

14
1.10.6 Type 6
This is the sequence for sending the VG data. The data must be sent for the desired
number of times.
Fig. 1-10-6-1
Flow
Command
Send/receive direction
1
STX
Command*1
(Parameters)
ETX
Send
2a (Successful)
ACK
Receive
2b (Failed)
STX
ESTS
Error code
ETX
Receive
3
STX
TRDT
Data
ETB
Send
4a (Successful)
ACK
Receive
4b (Failed)
STX
ESTS
Error code
ETX
Receive
3 and 4a or 4b are repeated for the desired number of times.
n-1
STX
TRDT
Data
ETX
Send
na (Successful)
ACK
Receive
nb (Failed)
STX
ESTS
Error code
ETX
Receive
Fig. 1-10-6-2
Note1) It is assumed here that the following three codes are entered in the command portion.
VG4CMD
Command 1
Command 2
Note2) The flow is terminated at 2b or 4b if communication failed.