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Siemens SIMATIC S5 CP 523 Manual page 244

Serial i/o module
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CP 523
Table A-19. Return Info and Error Flags in the Coordination Byte 'Receive' (CBR) in 3964(R) Mode
Bit
7 6
5 4 3 2 1 0
1
XX
*
H
0
03
H
05
H
07
H
09
H
0B
H
0D
H
11
H
13
H
15
H
17
H
1B
H
00
H
*
see error message
EWA 4NEB 811 6044-02a
Description
Return info for job request A080
Request accepted
No frame to fetch
Error flagged for A080
Parity error
Message frame length 0
Receive buffer full
Too many message frames received
Message frame too long (256 bytes)
DLE not doubled or no ETX after DLE
STX error, handshaking not started
with STX
Character delay time exceeded
Message frame delay time exceeded
Checksum error
Break
No errors
H
H
Data is rejected
Data is rejected
Buffer full, subse-
quent message frames
will be rejected
Data is rejected
Data is rejected
Data is rejected
Data is rejected
Data is rejected
Data is rejected
Data is rejected
Summary
Response
A-15

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