Omron CJ1W-EIP21 Manual Do Utilizador
242
Sending Explicit Messages
Section 9-1
Class ID (command):
The class ID of the destination of the explicit message.
Instance ID (command):
The instance ID of the destination of the explicit message.
Service data (command, response):
The data defined for the services codes.
No. of bytes received (response):
The number of bytes received from the destination node address (remote
node).
node).
Destination node address (remote node):
The node address of the OMRON Special I/O Slave Unit or Slave manufac-
tured by another company to which the explicit message was sent is returned.
tured by another company to which the explicit message was sent is returned.
Error code (response):
An error code defined in EtherNet/IP (1-byte general status and 2-byte addi-
tional status) is returned. The data format is DeviceNet-compatible (2 bytes
total), so the returned Error Code is converted to the 1-byte general status
and a 1-byte additional status (high byte only).
tional status) is returned. The data format is DeviceNet-compatible (2 bytes
total), so the returned Error Code is converted to the 1-byte general status
and a 1-byte additional status (high byte only).
Description
• The EXPLICIT MESSAGE SEND command is used to send an EtherNet/
IP-defined explicit message to another company’s node and receive a
response.
response.
• Unlike other FINS commands, the destination of a EXPLICIT MESSAGE
SEND command’s control data is the local node’s EtherNet/IP Unit or
built-in EtherNet/IP port, and the actual destination node is specified in
the command’s route path.
built-in EtherNet/IP port, and the actual destination node is specified in
the command’s route path.
Always specify the local node’s EtherNet/IP Unit or built-in EtherNet/IP port
in the CMND(490) instruction’s control data. An error will occur if another
node’s Master Unit is specified as the destination.
in the CMND(490) instruction’s control data. An error will occur if another
node’s Master Unit is specified as the destination.
• When an EtherNet/IP Unit or built-in EtherNet/IP port receives an explicit
message, it automatically returns a response to the message.
• A time of 2 s is used for request service processing timeouts.
Set the CMND(490) instruction’s timeout set value to 2 s or longer.
When there is a timeout, the error code will be 0102 hex.
When the CMND(490) instruction’s timeout set value is less than 2 s, a
FINS timeout error response of 0205 hex may occur.
When the CMND(490) instruction’s timeout set value is less than 2 s, a
FINS timeout error response of 0205 hex may occur.
Note
1.
For details on the parameters of explicit messages, refer to the EtherNet/
IP specifications.
IP specifications.
2.
The Open DeviceNet Vendor Association, Inc. (ODVA) can be contacted at
the following address to obtain copies of the EtherNet/IP and CIP specifi-
cations.
the following address to obtain copies of the EtherNet/IP and CIP specifi-
cations.
ODVA Headquarters
4220 Varsity Drive, Suite A
Ann Arbor, Michigan 48108-5006
USA
4220 Varsity Drive, Suite A
Ann Arbor, Michigan 48108-5006
USA
TEL: 1 734-975-8840
FAX: 1 734-922-0027
FAX: 1 734-922-0027
Email odva@odva.org
WEB www.odva.org