Siemens SIMATIC S5 Manual page 96

Data Transmission Using a Standard Connection
Programmable Controller 2
Proceed as follows:
Assign parameters in the DB1 of programmable controller 2 as described in section 4.2.
Program the individual blocks as described in the following section.
Transfer blocks DB1, OB1, DB8, and DB9 to programmable controller 2.
Cyclical Program for Station 2 (Programmable Controller 2)
The following was set in DB1:
• Send mailbox is in DB8 starting with data word DW0.
• Receive mailbox is in DB9 starting with data word DW0.
• Send coordination byte is in flag byte FY60.
• Receive coordination byte is in flag byte FY61.
OB1 for PLC 2
SEGMENT 1
0000 :
0001 : JU
0002 NAME : L2-STAND
0003 ANST : F 50.0
0004 ZIEL : KF 1
0005 LAEN : KF 4
0006 : BE
FB1 for PLC 2
SEGMENT 1
NAME : L2-STAND
DES : ANST
DES : ZIEL
DES : LAEN
0008 : A
0009 : JC
000A : A
000B :
000C :
000D :
000E :
000F :
0010 :
0011 : AN
0012 : S
0013 :
4-12
0000
Transmit to station 1.
FB 1
Transmit trigger bit, has to be set by user program, (is reset
after the transmit job is completed)
Station 1
Frame length of transmit data: 4 bytes
0000
I/Q/D/B/T/Z: E BI/BY/W/D: BI
I/Q/D/B/T/Z: D KM/KH/KY/KS/KF/KT/KC/KG: KF
I/Q/D/B/T/Z: D KM/KH/KY/KS/KF/KT/KC/KG: KF
F 61.7
= M001
DB 9
F 61.7
F 61.7
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