Phoenix Contact 2702772, User Manual

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GW EIP/ASCII...
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PHOENIX CONTACT 3785_en_B
Transmit messages have the following characteristics:
– In “Write MSG from PLC” mode, all messages received from a PLC are transmitted,
regardless if the produced data sequence number has changed or not.
– For “Class 1 from PLC” mode, messages received from a PLC are only transmitted if
the sequence number has changed.
– If the “TX MSG Sequence Number Checking” field is checked, produced data
sequence numbers that are not incremented from the last transmit message will be
identified as errors. Statistics will be provided in the diagnostic pages.
– The data length field indicates the number of valid bytes contained in the message.
– The actual length of a message received from the PLC may contain extra, unused data.
– All unused bytes in a message are ignored.
– A “Get” command returns the last successfully transmitted serial/socket packet.
5.2 EtherNet/IP interface profile (ControlLogix)
5.2.1 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 GW EIP/ASCII... over
EtherNet/IP.
There is one instance of this object per serial port. The instance number corresponds to
the associated serial port number on the GW EIP/ASCII.... Port numbers are numbered
from one to N.
Table 5-3 Serial port data transfer object class attributes
Attribute ID Name Data type Data value Access
rule
1 Revision UINT 1 Get
2 Max instance UINT Number of ports on the GW EIP/ASCII... Get
3 Num instances UINT Number of ports on the GW EIP/ASCII... Get