466
Jetter AG
10 Programming
Number
Part
Function
9
Status and control
register
Query of filling levels and error states of buffers;
setting of transmission parameters
A character is received as described below:
Step
Description
1
The interface driver converts signals "on the line" into internal signal levels
and forwards them to the receiver.
2
The receiver performs serial/parallel conversion of this character and
checks the set communication parameters.
3
The receiver enters the character into the receive buffer if there is any
place left. Otherwise, the character is discarded and buffer overflow is
signaled.
4
Via receive register the character can be read out of the receive buffer.
A character is transmitted as described below:
Step
Description
1
Via transmit register the character is entered into the transmit buffer if
there is any place left. Otherwise the character is discarded.
2
Once the transmitter has sent a character, it reads the next character from
the transmit buffer.
3
The transmitter performs parallel/serial conversion and sends this
character to the interface driver using the set communication parameters.
4
The interface driver converts internal signal levels into the various
interface standards.
When receiving characters, the following errors are detected by the controller
and displayed in the register
Error state
:
Error
Description
Effect
Framing error The format of the received
character does not match the
set parameters.
The erroneous character(s) is (are)
stored in the receive buffer and
error bit
Framing error
is set. The
error counter is incremented.
Parity error
The parity bit of the received
character is not correct.
The erroneous character is stored
in the receive buffer and error bit
Parity error
is set. The error
counter is incremented.
Buffer overflow A character is received,
although the receive buffer is
full.
The character is discarded and
error bit
Overflow
is set. The error
counter is incremented.
As error bits cannot be assigned to individual characters in the receive buffer,
Receiving a character
Sending a character
Error detection
Troubleshooting
Содержание JC-120MC
Страница 1: ...User Manual JC 120MC Controller 60880901 We automate your success...
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Страница 40: ...40 Jetter AG 3 Identifying Hardware revisions see page 38 Related topics...
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Страница 395: ...Jetter AG 395 JC 120MC Programming Result When initializing the JX2 system bus the adjusted baud rate values were used...
Страница 485: ...Jetter AG 485 JC 120MC Programming Topic Page Programming 486 Registers 498 Contents...
Страница 521: ...Jetter AG 521 JC 120MC Programming Use 29 bit identifier Default 11 bit identifier...
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