CP 523
Communications Mode
If transmission errors occur during reception (characters are lost, framing error, parity error), the
CP continues receiving until the connection is cleared down, transmits NAK to the link partner,
and waits for a retry as described above.
Example of error-free data interchange:
Figure 7-3. Error-Free Data Interchange (Receive)
CP 523
3964(R) mode
Partner in the link
STX
1st character
nth character
DLE
ETX
BCC
*
DLE
DLE
*) BCC in3964R mode only
a a a
a a a
a a a
a a a
a a a
a a a
a a a
a a a
a a a
a a a
a a a
.
.
.
EWA 4NEB 811 6044-02a
7-5