Operating Instruction Manual SyCon System Configurator for ...

Settings 45/132
Stop bits:
Number of stop bits. You can select 1 stop bit or 2 stop bits.
Parity:
Determination of the Parity bit. You can select no, even and odd.
Mode:
The protocol works in two different modes: Master and Slave mode.
Master mode: The data transmission is introduced by the ASCII protocol.
Data is sent to the remote partner and the answers are read in and transmit
to the device internal processing.
Slave mode: The remote partner sends a telegram which is received and
passed on by the ASCII protocol. Depending on the application related
design it is already answered at the protocol layer with a positive
acknowledgement and in case of a transmission error with a negative
acknowledgement. After the processing of the telegram an answer
telegram can be hand out to the remote partner.
These modes are selected to avoid initialization conflicts by simultaneous
sending. This has to be controlled at the protocol layer by the user.
In the Master mode the remote partner is only allowed to answer, if it has
received a telegram before. Just then the ASCII protocol is ready to
receive.
In the Slave mode the ASCII protocol is always ready for send and
receives. As a rule the telegram transfer is started by the Master, which
waits for an answer afterwards before it sends the next telegram. In case of
simultaneous receiving of the receive telegram and the transmit job the
receive telegram has priority. The data transmission in this mode can be
realized only from one transmission direction.
During the ASCII protocol sends data it is not ready to receive. Continuous
receiving of data suppresses the send mode. The Master device and the
user respectively are responsible for the synchronization.
SyCon | System Configurator for Ethernet and serial Protocols
DOC040601OI04EN | Revision 4 | English | 2012-06 | Released | Public © Hilscher, 2004-2012