Comtrol UP DeviceMaster User Guide - Manual (Page 56)

56 - Chapter 2. Programming Interface DeviceMaster UP Modbus/TCP User Guide: 2000447 Rev. I
PLC-5/SLC and MicroLogix Interfaces
2.4. PLC-5/SLC and MicroLogix Interfaces
EtherNet/IP firmware versions 2.01 or later supports EtherNet/IP connections to the PLC-5 and SLC PLCs.
As of EtherNet/IP version 3.02, the PLC-5 and SLC interface supports:
• Polling, Write-to-File, and Write-to-File-Synced receive communication methods.
• PCCC based messages transferred by means of the PCCC object, 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)
• Configuration of the DeviceMaster UP only through the embedded web page. There is no DeviceMaster
UP configuration available through the PLC-5 and SLC PLCs. See the following topics for more
information:
- 5.4. SLC or MicroLogix PLC Programming Example Instructions on Page 116
- 5.5. PLC-5 PLC Programming Example Instructions on Page 143
• Receive, transmit and statistics data.
• Standard PLC-5/SLC file naming conventions.
• Ethernet device interface via Ethernet TCP/IP sockets.
• Application interface via Ethernet TCP/IP sockets.
• Filtering and data extraction:
- String filtering of up to 128 bytes.
- RFID - EPCglobal tag data filtering and data extraction.
- Barcode - UPC/EAN barcode data filtering and data extraction.
- Independent filtering criteria to the PLC and application.
• Serial data packet transfers up to 1518 bytes and socket packet data transfers up to 2048 bytes in the
Write-to-File and Write-to-File-Synced receive methods.
• Controlled message rate to the PLC when operating in the Write-to-File receive method. This is
accomplished by setting the Maximum PLC Update Rate.
The primary differences between the PLC-5/SLC interface and the ControlLogix interfaces are:
• Since the PLC-5 and SLC PLCs operate on a file memory system, the PLC-5/SLC interface provides
Write-to-File and Write-to-File-Synced communication methods. They operate in a very similar manner to
the Write-to-Tag and Write-to-Tag-Synced methods available for the ControlLogix family of PLCs.
• Polling is performed through the PLC-5/SLC specific messages instead of accessing the Serial Port Data
Transfer object.
• When configuring the DeviceMaster UP to operate in Write-to-File or Write-to-File-Synced, enter the file
name starting with a $ (i.e. $N10:0) for SLC and PLC-5, and with a # (i.e. #N10:0) for MicroLogix.
• The maximum serial and socket port packet sizes in polling mode are smaller due to PCCC message size
limitations.
• The configuration options cannot be set through SLC or PLC-5 messages.
Note: 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. For ease of programming,
Comtrol recommends the Write-to-File receive method used with the Maximum PLC Update Rate option