Phoenix Contact 2702772, User Manual

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Configuration and startup
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Advanced configuration
Enable TX sequence number check: If enabled, the sequence number is checked and
messages are only transmitted if the sequence number is incremented from the previous
sequence number. When a duplicate sequence number is received and the “Transfer mode
from PLC” field is set to Write Msg , the message is rejected and the “Duplicate Transmit
Sequence Error Count” counter increments. When a duplicate sequence number is
received and the “Transfer mode from PLC” field is set to Class 1 , the message is ignored.
In either case, if a message is received with an unexpected sequence number that is not a
duplicate or an incremented sequence number, the “Unexpected Transmit Sequence Error
Count” counter increments. If disabled, all transmit messages are transmitted regardless if
the sequence number has been incremented or not.
Disable Rx Queue (to PLC): Select this option to only receive the last received data
packet. If two or more packets are received during the “Maximum PLC Update Rate” time
period, only the last received data packet is returned.
Receive MicroLogix MSB first: Enable this option when the GW EIP/ASCII... should
receive the most significant byte (MSB) of a 16-bit integer first. This option is disabled by
default and the least significant byte (LSB) is received first.
Transmit MicroLogix MSB first: Enable this option when the GW EIP/ASCII... should
transmit the most significant byte (MSB) of a 16-bit integer first. This option is disabled by
default and the least significant byte (LSB) is transmitted first.
4.7.2.1 Class 1 overview
The “Class 1 Overview” pages provide an array of highly informative Class 1 interface
information to aid when programming a PLC.
Figure 4-12 “Class 1 Overview” page