Siemens SIMATIC S5 Manual page 94

Data Transmission Using a Standard Connection
Programmable Controller 1
Proceed as follows:
Assign parameters in DB1 of programmable controller 1 as described in section 4.2.
Program the individual blocks as described in the following section.
Transfer blocks DB1, OB1, DB6, and DB7 to programmable controller 1.
Cyclical Program for Station 1 (Programmable Controller 1)
The following was set in DB1:
• Send mailbox is in DB6 starting with data word DW0.
• Receive mailbox is in DB7 starting with data word DW0.
• Send coordination byte is in flag byte FY62.
• Receive coordination byte is in flag byte FY63.
OB1 for PLC 1
NETZWERK 1
0000 :
0001 : JU
0002 NAME : L2-STAND
0003 ANST : F 50.0
0004 ZIEL : KF 2
0005 LAEN : KF 4
0006 : BE
FB1 for PLC 1
Netzwerk 1
NAME : L2-STAND
BEZ : ANST
BEZ : ZIEL
BEZ : LAEN
0008 : U
0009 : JC
000A : A
000B :
000C :
000D :
000E :
000F :
0010 :
0011 : UN
0012 : S
0013 :
4-10
0000
Transmit to station 2.
FB 1
Transmit trigger bit, has to be set by user program, (is reset
after the transmit job is completed)
Station 2
Frame length of transmit data: 4 bytes
0000
E/A/D/B/T/Z: E BI/BY/W/D: BI
E/A/D/B/T/Z: D KM/KH/KY/KS/KF/KT/KC/KG: KF
E/A/D/B/T/Z: D KM/KH/KY/KS/KF/KT/KC/KG: KF
F 63.7
= M001
DB 7
F 63.7
F 63.7
Explanation
Explanation
L2 standard connection
If receive mailbox enabled to receive,
jump to 'SEND' program section.
Open receive mailbox data block
============================================
Program section for evaluation of received data
============================================
CBR bit "Enable receive"
Enable RM to receive
S5-95U, SINEC L2
EWA 4NEB 812 6112-02