User guide

set ia
138 Chapter 2 Command Descriptions
checksum={bcc|crc} (df1fullduplex, df1halfduplex)
Selects the checksum or error-detection method used by the attached
device. DF1 supports both a 16-bit CRC (“crc”) and an 8-bit Block Check
Code (“bcc”). Rockwell ‘C*Logix’ processors default to “bcc,” while
MicroLogix and other PLC families tend to default to “crc.” The Digi
device default is “crc.”
class={ucmm|cm3} (ethernetip)
Selects either Unconnected ("ucmm") or Connected Class 3 ("cm3")
explicit messaging for client (ODVA ‘Originator’) connections to remote
slaves (ODVA ‘Targets’).
Since only PCCC messages are currently supported, the CIP service
Exec_PCCC (0x4B) is used to the Rockwell PCCC Object. To
communicate to a ControlLogix, this option must be set to "cm3," and the
"connpath" option must be set. The default is "cm3. "
connpath=”path” (ethernetip)
Defines an optional ForwardOpen connection path for client (ODVA
‘Originator’) connections to remote slaves (ODVA ‘Targets’). To
communicate to a ControlLogix processor, you will need to enter the slot
number the form “sN”, where N is the number such as “s0” or “s7”. The
default is no path or “”.
dontecho={on|off} (chat)
Tells the Digi device to echo ("on") or not echo ("off") bytes directly to
attached Telnet clients. This compensates for the fact that most systems
rely on the attached serial device to echo data, but since within the CHAT
protocol, it holds all client bytes until the end-of-line is detected. The
default is "off."
duplex={half|rcv_only|xmt_only} (custom, ascii_import)
Defines message behavior per the port to the server device.
half
Specifies poll/response behavior. A poll is sent and the Digi device
waits strictly for a response from the slave device.
rcv_only
The Digi device only receives data from the attached device. No data
is transmitted and any received for transmit is discarded.
xmt_only
The Digi device only send data to the attached device. Any data
received is discarded.
The default is "half."
duplicatedetection={on|off} (df1fullduplex, df1halfduplex)
Filters out consecutive requests that have identical command, source,
and TNS bytes. This behavior is necessary for compliance with the DF1
specification. The default is "on."