Framing Error On Master; Nak Reply By Dinplayer; Transmitting A Command By Master; How To Read The Figures Of The Dedicated Protocols - inout Dinplayer D01-MKII User Manual

8.3 " Framing" error on the master
When commercial RS-485 interfaces are used on the master, a Framing error may take
place if nothing is being transmitted on the serial line.
In order to avoid this mishap, it is indispensable that the system master ignores all the data
until it has received one of the STX, ACK or NAK characters coming from a DINplayer.

8.4 NAK reply by DINplayer

The reply with the character NAK is sent from DINplayer to the master when any kind of
error is detected in the message received.

8.5 Transmitting a command by master

When you send a command from the master to DINplayer using one of the dedicated
protocols, make sure you send it with a delay of at least 10mS starting from the moment
the last command received by DINplayer has been completely performed.
IMPORTANT:
when one is using the RS485 bus (only on a duplex cable) remember to bear in mind or to
ignore the echo of the command that is sent from the master (with RS485 an echo is
always present).

8.6 How to read the figures of the dedicated protocols

When the master reads the data from DINplayer.
(DINplayer > Master)
DINplayer
The data areas A and C indicate the transmission of data from the master to DINplayer.
a)
The data area B indicates the transmission of data from DINplayer to the master.
b)
The programme of the Master is structured so as to manage the data in the manner
c)
shown on the figure from left to right. Therefore, the data management sequence is A, B, C.
In area A, the character ENQ (05
Example :
indicated as "
Data
DINplayer User Manual v.2.3
A
E
N
Data
Master
Q
" in the figure to the right of the character ENQ.
C
A
C
Data
K
S
T
Data
X
B
) is transmitted, followed by all the other data
H
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