Toshiba VF-A7 Manual Do Utilizador

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10. Modbus TCP/IP 
The ETH-100 interface supports Schneider Electric’s Modbus TCP/IP protocol, 
release 1.0.  The ETH-100 is conformance class 0 and partial class 1 compliant, and 
allows up to 8 simultaneous Modbus TCP/IP client connections (sockets).  Socket 
timeouts are set to 30s, which means that if a particular open socket experiences no 
activity for more than 30s, then the interface assumes that the client has experienced 
some sort of unexpected problem, and the ETH-100 will close that socket. 
 
 
10.1  Drive Channel Access 
Each specific drive channel (Channel A, Channel B and Channel C) is accessed via 
the “Unit Identifier” (UI) field of a Modbus TCP/IP packet.  Drive channel A is 
accessed when the UI field is set to “1”, channel B is accessed when the UI field is 
set to “2”, and channel C is accessed when the UI field is set to “3”.  Any other UI 
setting is invalid and will result in a GATEWAY PATH UNAVAILABLE exception 
(Modbus TCP/IP exception code 0A). 
 
 
10.2  Supported Modbus Functions 
The ETH-100 interface supports the Modbus TCP/IP function codes indicated in 
Table 1. 
 
Table 1: Supported Modbus TCP/IP Functions 
Function Code 
Function 
Class 
Read multiple registers 
Write single register 
16 
Write multiple registers