User guide

MDX-ETHERNET User Guide 49
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13.5.3 E-mail triggers
The trigger requires a transition from 0 to 1 on Pr 15.54, after this transition e-mail is
sent.
Pr 15.54 can be affected to a drive digital input.
To complete the process you need to enter an appropriate e-mail source name, a
destination e-mail address, the title of the e-mail, any text you wish to send.
13.6 Modbus TCP/IP (LS implementation)
Modbus TCP/IP is one of the most widely supported Industrial Ethernet based protocols
offering the functionality and simplicity of the Modbus protocol, combined with the
flexibility of Ethernet. The MDX-ETHERNET implementation of Modbus TCP/IP uses a
subset of the standard protocol provided by the Modbus organization. Modbus TCP/IP
is an application layer protocol for communication between automation devices utilizing
an Ethernet network connection. It is a client-server protocol where the client sends a
request and waits for the server to respond.
13.6.1 Data structure
Communication between devices is based upon Application Data Units (ADUs) as
shown in Figure 13-1. The ADU consists of two parts, the Modbus Application Protocol
(MBAP) (Table 13.5) and the Protocol Data Units (see Table 13.6). Modbus TCP/IP
extends the standard PDU to include an IP specific 7-byte header called the Modbus
Application Protocol (MBAP).
Figure 13-1 ADU
Send e-mail on transition 0 -> 1
Pr 15.54
Default 0 (OFF)
Range 0 (OFF) to 1 (ON)
Access RW
The port for Modbus TCP/IP communication is 502.
NOTE
It is important that when you implement the Modbus TCP ADU as shown in Figure 13-1,
you include the MBAP as well as the PDU.
The rest of this section does not repeat the MBAP header for each function code for
reasons of clarity.
MBAP
PDU
ADU (TCP/IP)
NOTE
NOTE