Phoenix Contact 2702772, User Manual

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MicroLogix, SLC, and PLC-5 interface
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6 MicroLogix, SLC, and PLC-5 interface
The MicroLogix, SLC, and PLC-5 interface supports polling and write-to-file receive
communication, PLC writes transmit communication, or PCCC-based messages
transferred by means of the PCCC objects including:
– SLC Typed Read Message
– SLC Typed Write Message
– PLC-5 Typed Read Message (logical ASCII address format)
– PLC-5 Typed Write Message (logical ASCII address format)
The “Write-to-Tag/File” field in the “Transfer mode to PLC” supports transfers up serial data
packet transfers up to 1518 bytes for serial data and 2048 bytes for socket connections.
Message rates are controlled by setting the “Maximum PLC update rate” field.
Class 1 is not supported when the PLC type is set to MicroLogix. Since the MicroLogix, SLC,
and PLC-5 controllers operate on a file memory system, the Write to Tag/File must be
selected in the “Transfer mode to PLC” field. When operating in Write to Tag/File mode,
the PLC type must be set to MicroLogix. When configuring the GW EIP/ASCII... to operate
in Write to Tag/File mode, enter the file name starting with the standard file format, i.e.,
N10:0. Polling is performed through the PLC-5/SLC-specific messages instead of
accessing the “Serial Port Data Transfer” object. The maximum serial and socket port
packet sizes in polling mode are smaller due to PCCC-message size limitations.
It is recommended to use the “Write to Tag/File” option in conjunction with the “Maximum
PLC Update Rate” option to send data to a MicroLogix, SLC, or PLC-5 controller. While
ControlLogix PLCs support the SLC and PLC-5 messages, using those messages on
ControlLogix PLCs is not recommended due to data size and performance considerations.
6.1 Requirements
The MicroLogix, SLC or PLC-5 controller must support EtherNet/IP, multihop, and
ControlLogix devices. Table 6-1 lists PLC and firmware that meet these requirements.
NOTE:
Older versions of the PLC firmware may or may not provide EtherNet/IP functionality.
Always verify compatibility that older versions of the PLC firmware provide EtherNet/IP
functionality before using it with a GW EIP/ASCII... device. To update PLC firmware,
contact your Rockwell distributor.