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Sending Explicit Messages Section 9-1
In the routing format for rely hops, the first service code (in the routing service
data) is 52 Hex, which is the Unconnected Send service.
Request path size (command):
Specifies the number of words of data that are specified in the request path
field.
In the routing format for relay hops, the first request path size (in the routing
service data) is 02 Hex.
Request path (command):
Specifies the request path (class ID, instance ID, etc.) in bytes. If there is an
odd number of bytes, pad the last byte with a 0 so that the data is in full word
units.
In the routing format for relay hops, the first request path (in the routing ser-
vice data) is 20 06 24 01 Hex (Connection Manager). For details, refer to the
description of the Route Path in Appendix D CIP Message Communications.
Request data (command):
In the command, specify the data determined by the service code.
In the response, the reception data determined by the service code will be
returned.
Priority/Time tick (command):
The timeout time specified by the Priority Time Tick is used as a base value to
specify the actual timeout value. For details, refer to the description of the Pri-
ority/Time Ticks and Time Out Ticks at the end of Appendix D CIP Message
Communications.
Time Out Ticks (command):
Specifies the base value of the timeout time. For details, refer to the descrip-
tion of the Priority/Time Ticks and Time Out Ticks at the end of Appendix D
CIP Message Communications.
Message request size (command):
Specifies the number of bytes of data from the second service code to the
request data. The data size is specified in LSB, MSB order.
For example, if there are 400 bytes, the data size is 0190 hex bytes, which is
entered as 90 01 hex.
Padding data (command):
If the message request size specifies an odd number of bytes, use 00 hex as
padding in the last byte. The padding data is not required if there is an even
number of bytes.
Route path size (command):
Specifies the number of words of data that are specified in the route path field.
Route path (command):
Specifies the path (route path) to the target device. For details, refer to the
description of the Route Path in Appendix D CIP Message Communications.
No. of bytes received (response):
This hexadecimal value is returned to indicate the number of bytes of data
received after the service code (response).
General status (response):
The general status defined in EtherNet/IP is returned. The normal response is
00 hex. For details, refer to the description of the Response Codes in Appen-
dix D CIP Message Communications.
Additional status size (response):