Task Code +2E Communication Port; Task Code +30 Communication Port; Task Code +32 Communication Port; Task Code +34 Communication Port - Hitachi Hidic EH-150 Applications Manual

Ethernet module

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Preliminary Rev.03

6.2

Task code port

EH-ETH has four logical ports for task code communication.

Task code port supports TCP and UDP of data link layer. Table 6.2 shows the comparison to use.

Open request/ close request procedure

Communication with LADDER Editor for Windows®

Reliability of the data in a data link layer level

[For host computer programmer]

- When you select TCP

1.Because all task ports are "LISTEN", before issuing task code, you need to open connection.

- When you select UDP,

1. UDP protocol does not have reliability of communication, application program need to confirm the response, and

control to re-send, packet order.

2. You do not open connection before issuing task code.

Caution

Task code port can not transmit data actively in spite of TCP or UDP protocol.

The contents of this manual might be changed without notice.

Table 6.2 Task code port

Compression Item

Chapter 6 Task code communication

TCP

H Host side:

Need

EH-ETH side: No

Possible

High

6-4

UDP

Host side:

EH-ETH side: No

Not possible

Low

Eh-eth