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CTI 2572 Installation and Operation Guide
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5.4. Application Example
Application
A Siemens SIMATIC 505 PLC is used to update a Siemens S7 PLC with process information. When
the S7 receives the information, it sends status information back to the 505 PLC.
Assumptions
• The SIMATIC 505 PLC uses the 2572 as a network TCP/IP interface.
• The S7 uses a CP343-1 TCP/IP interface.
• The 2572 will be configured as the Active partner
• The S7 will be configured as the Passive partner
• The IP address of the 2572 is 192.168.1.2 (Dotted hexadecimal is C0.A8.01.02).
• The TSAP for the SIMATIC 505 connection endpoint is “PLCA”. This TSAP string is stored at
V500 in the SIMATIC 505 PLC.
• The IP address of the CP343 interface is 192.168.1.3
• The TSAP for the S7 connection endpoint is “S701”. This TSAP string is stored at V510 in the
SIMATIC 505 PLC.
• The 2572 will send 100 words of data obtained from V1000 – V1099.
• The S7 will reply with 10 words of status information, which will be written to V1200 – V1209.
• The 2572 module is logged into the PLC at WX1.
• No router is used on the network.
CP 2572 Command Blocks
Open Active Connection
Address Description Hex Decimal
V100 Error Word 0000 0
V101 Command Code 2E01 11777
V102 Connection Number 4B15 19221
V103 Protocol Manager Number 002E 46
V104 IP address of Partner – High 16 bits C0A8 49320
V105 IP address of Partner – Low 16 bits 0102 258
V106 Flags 0000 0
V107 Length of local TSAP (in bytes) 0004 4
V108 Start V-memory address of local TSAP 01F4 500
V109 Length of remote TSAP (in bytes) 0004 4
V110 Start V-memory address of remote
TSAP
01FE 510
V111-115 Unused 0000 0