Microscan MS-4X Manuel d'utilisateur télécharger pdf (Page 44)

2-16 MS-Connect 210 User’s Manual

EtherNet/IP Serial Interface (Class 0x68)

Send Length

This parameter specifies the length of the send data. The maximum number of bytes that

can be sent in one message is 470 bytes.

Receive Length

This parameter specifies the largest amount of receive data the host can accept. It is only

effective in the Send_with_Response service. In a Send_with_Response or

Get_Attribute_Single reply it indicates the number of data bytes actually included in the

message. The Get_Attribute_Single reply will contain all the bytes available in the receive

queue up to the maximum. The maximum number of bytes that can be received in one

message is 470 bytes.

Receive Idle Timeout

This parameter specifies the longest amount of idle time in milliseconds (ms) the host is

willing to wait once any data is available. It is only effective in the Send_with_Response

service. For the Get_Attribute_Single service this value is assumed to be 0. A value of 0 is

used for immediate idle timeout and the service will reply immediately after data is available.

A value of 255 (FF in hex) disables the idle timeout. In a Send_with_Response reply it

indicates the number of milliseconds of idle time the firmware actually waited for additional

receive data.

Send Flags

The Send Flags field gives the host some additional controls over the serial output.

Flushing the output queue allows the host to remove outgoing data and replace it with

newer or higher-priority data.

Receive Flags

The Receive Flags field gives the host some additional controls over the serial input. It is

only effective in the Send_with_Response service.

Flushing the input queue allows the host to remove irrelevant data that was collected by

the communication adapter.

Bit (0 = LSB) Status Flag

0 Flush — Flushes the serial output queue before sending the data

enclosed in the message.

1-7 Reserved

Bit (0 = LSB) Status Flag

0 Flush — Flushes the serial input queue before receiving new

incoming data.

1-2 Reserved

3 Framing — Serial protocol framing is enabled (see Frame Trailer

(Postamble) Flags). This bit can be checked in the response to see

if the correct frame format was received.

4-7 Reserved

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Microscan MS-4X Manuel d'utilisateur Page 44