Hardware And Software Prerequisites - Siemens SIMATIC S7 Manual

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Hardware and Software Prerequisites

Usable Modules
Software Versions
Memory
requirements
OPEN MODBUS / TCP communication via CP343-1 and 443-1
2XV9450-1MB00; Manual edition 4.3
You can find the latest hardware prerequisites on the internet:
www.siemens.com/s7modbus.
The usage of the modbus blocks is possible with STEP7 Version 5.4 or
higher. Withal the use of the blocks AG_LSEND/AG_LRECV V3.1 of the
update of SIMATIC NET library
(http://support.automation.siemens.com/WW/view/en/22172239) is required.
The FB MODBUSCP requires ca. 6k byte work and load memory.
The FB MB_CPCLI requires ca.10k byte work and memory.
The FB MB_CPSRV requires ca. 10 k byte work and load memory.
The particular length of the blocks can be determined in the properties of the
block in the Simatic Manager.
Product description
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