Technical data

7.1.1 Sequence of the Data Transmission
Figs. 7.1 to 7.3 are schematics showing how the relevant bits of the ANZW
change during correct or incorrect data transmission. The transmitting L2
station is defined as "local", the receiving L2 station as "remote".
ANZW local ANZW remote Meaning
0004
H
Previous job complete without error
0002
H
Job active (data being sent)
0008
H
Job complete with error
0001
H
Receive possible (data can be fetched from
the CP)
0005
H
Previous job complete without error and
RECEIVE possible
Table 7.2 Changes in the Status Word During Job Processing
S5-Adr.
ANZW
ANR
SSNR
PAFE
CP
Anzw = Job_complete_without_error
Anzw = Job_active
(data)
CP
BUS
FB
SEND
S5 add.
ANZW
ANR
SSNR
PAFE
FB
RECEIVE
Anzw = RECEIVE possible
Anzw = Job_complete_without_error
e.g. :DB
e.g. :DB
Control program sender
Control program receiver
Fig. 7.1 Job Processing - No Error Occurred
S5-S5 Communication B8976060/02
Volume 1 7 - 4