Siemens Simatic S7-200 System Manual page 89

Example: Network Read and Network Write Instructions
S7-200 Instruction Set
Network 1 //On the first scan, enable the PPI master mode
/and clear all receive and transmit buffers.
LD SM0.1
MOVB 2, SMB30
FILL +0, VW200, 68
Network 2 //When the NETR Done bit (V200.7) is set
//and 100 cases have been packed:
//1. Load the station address of case packer #1.
//2. Load a pointer to the data in the remote station.
//3. Load the length of data to be transmitted.
//4. Load the data to transmit.
//5. Reset the number of cases packed
// by case packer #1
LD V200.7
AW= VW208, +100
MOVB 2, VB301
MOVD &VB101, VD302
MOVB 2, VB306
MOVW +0, VW307
NETW VB300, 0
Network 3 //When the NETR Done bit is set, save the control
//data from case packer #1.
LD V200.7
MOVB VB207, VB400
Chapter 6
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