Product Short Description
Product Overview:
The Siemens 505-CP2572 is a TCP/IP Ethernet communication module that logs into a TI 505 I/O rack as a special function module. It enables a 505-series PLC to exchange data over Ethernet using connection-oriented (TCP) or connectionless (UDP) services, and provides a PLC logic interface for message-based communication.
Description
Technical Specifications:
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Manufacturer: Siemens
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Order Number: 505-CP2572
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Product Line: TI 505
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Protocol Stack: TCP/IP (TCP & UDP)
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Physical Layer: 10 Mbit/s, half-duplex
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Front-panel Port: AUI, DB-15 female (per IEEE 802.3 10Base5)
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Interface to PLC: 2 WX words + 6 WY words (special function module login)
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Command Slots: 4 independent command blocks in V-memory
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Replacement Product: CP 1434 TF (TI 505)
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Application-layer: TCP-based send/receive (S/R)
Key Features:
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Send/receive messaging via PLC ladder logic using WX/WY words and V-memory command blocks
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Four concurrent command slots for parallel Ethernet transactions
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Standard Berkeley Socket / Winsock-compatible TCP/IP stack
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Works over local Ethernet or WAN links
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AUI port requires an external transceiver (MAU) or AUI-to-UTP converter for 10Base-T
Application Scenarios:
Legacy TI 505 PLC Ethernet integration, HMI/SCADA communication, peer-to-peer 505 PLC messaging, and migration paths to newer Siemens CP modules.
Installation & Usage Notes:
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Always verify the physical module version, firmware version, and the applicable “Appendix: New Features” document version – mismatches are common in field units.
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For AUI-connected CP2572, hard-code 10 Mbit/s, half-duplex on the connected switch/hub for reliable operation.
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Command blocks must be contiguous V-memory words; size them per the chosen command.
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Use WY words to trigger command execution and WX words to monitor status.
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When migrating, consider the CP 1434 TF replacement.
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