Class attributes, Instance attributes, Common services – Comtrol UP DeviceMaster User Guide User Manual
Page 29: Serial port data transfer object, Definition (71 hex), Serial port data transfer, Object definition (71 hex)

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