Comtrol UP DeviceMaster User Guide - Manual (Page 29)

DeviceMaster UP Modbus/TCP User Guide: 2000447 Rev. I Chapter 2. Programming Interface - 29
Serial Port Data Transfer Object Definition (71 Hex)
2.3.2. Serial Port Data Transfer Object Definition (71 Hex)
The Serial Port Data Transfer vendor specific object defines the attributes by which the PLC can transfer data
to and from a serial port device through a DeviceMaster UP over EtherNet/IP.
Note: There is one instance of this object per serial port. The instance number corresponds to the associated
serial port number on the DeviceMaster UP. (Port numbers are numbered from one to N.)
2.3.2.1. Class Attributes
2.3.2.2. Instance Attributes
2.3.2.3. Common Services
Attribute ID Name Data Type Data Value(s) Access Rule
1 Revision UINT 1 Get
2 Max Instance UINT Number of ports on the DeviceMaster UP Get
3 Num Instances UINT Number of ports on the DeviceMaster UP Get
Attribute ID Name Data Type Data Value(s) Access Rule
1
Transmit (PLC to DeviceMaster UP) message data.
Structure of:
Produced data sequence number
Data length
Data array
UINT
UINT
Array of USINT
0-65535 (FFFF hex)
1-440
0-255
Set/Get
2
Receive (DeviceMaster UP to PLC) message data
Structure of:
Produced data sequence number
Data length
Data array
UINT
UINT
Array of USINT
0-65535 (FFFF hex)
0-440*
0-255
Get
3
Receive (DeviceMaster UP to PLC) produced data sequence number
Normally sent to the PLC from the
DeviceMaster UP in data transfer.
UINT 0-65535 (FFFF hex) Set/Get
4
Receive (DeviceMaster UP to PLC) consumed sequence number
Normally updated by the PLC in the
Write-to-Tag-Synced receive method.
UINT 0-65535 (FFFF hex) Set/Get
5
Transmit (PLC to DeviceMaster UP) produced data sequence number
Normally sent to the DeviceMaster
UP from the PLC in data transfer.
UINT 0-65535 (FFFF hex) Set/Get
* For the Polling receive method only. The maximum sized serial port message in the Write-to-Tag and
Write-to-Tag-Synced receive method is 1518 bytes.
Service Code Implemented in Class Implemented in Instance Service Name
0E Hex Yes Yes Get_Attribute_Single
10 Hex No Yes Set_Attribute_Single