Siemens Simatic S7-200 System Manual page 324

Instruction Set
Network 1
SM0.1
Network 2
V200.7 VW208
==I
100
Network 3
V200.7
Network 4
SM0.1 V200.6
/ /
Figure 10-63
10-136
LAD
MOV_B
EN
2 IN OUT SMB30
FILL_N
EN
0 IN OUT VW200
68 N
MOV_B
EN
2 IN OUT VB301
MOV_D
EN
&VB101 IN OUT VD302
MOV_B
EN
2 IN OUT VB306
MOV_W
EN
0 IN OUT VW307
NETW
EN
VB300 TABLE
0 PORT
MOV_B
EN
VB207 IN OUT VB400
V200.5
MOV_B
/
EN
2 IN OUT VB201
MOV_D
EN
&VB100 IN OUT VD202
MOV_B
EN
3 IN OUT VB206
NETR
EN
VB200 TABLE
0 PORT
Example of NETR and NETW Instructions
Network 1
On the first scan,
LD SM0.1
enable the PPI+
MOVB 2, SMB30
protocol.
FILL 0, VW200, 68
Clear all receive and
transmit buffers.
When the NETR
Done bit is set and
Network 2
100 cases have
LD V200.7
been packed, load
AW= VW208, 100
the station address
of case packer #1.
MOVB 2, VB301
MOVD &VB101, VD302
Load a pointer to the
MOVB 2, VB306
data in the remote
station.
MOVW 0, VW307
NETW VB300, 0
Load the length of
the data to be
transmitted.
Load the data to be
transmitted.
Reset the number of
cases packed by
case packer #1.
Network 3
LD V200.7
When the Done bit is
MOVB VB207, VB400
set, save the control
data from case
packer #1.
Network 4
When the NETR is LDN SM0.1
not active and there
AN V200.6
is no error, load the
AN V200.5
station address of
case packer #1. MOVB 2, VB201
Load a pointer to the MOVD &VB100, VD202
data in the remote
MOVB 3, VB206
station.
NETR VB200, 0
Load the length of
the data to be
received.
Read the control and
status data in case
packer #1.
S7-200 Programmable Controller System Manual
C79000-G7076-C230-02
STL