
Rockwell Automation Publication 2080-UM002N-EN-E - November 2022
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Chapter 5 Communication Connections
CIP Serial Client/Server – DF1
CIP Serial Client/Server allows CIP protocol to be used over a serial port. It is typically used
with modems. The advantage over non-CIP serial protocols is that since the protocol is CIP,
program downloads are supported including CIP pass-through from the serial port to Ethernet.
ASCII
ASCII provides connection to other ASCII devices, such as bar code readers, weigh scales,
serial printers, and other intelligent devices. You can use ASCII by configuring the embedded
or any plug-in serial RS-232/RS-485 port for the ASCII driver. See the Connected Components
Workbench Online Help for more information.
To configure the serial port for ASCII, see
.
Modbus TCP Client/Server
The Modbus TCP Client/Server communication protocol uses the same Modbus mapping
features as Modbus RTU, but instead of the serial port, it is supported over Ethernet. Modbus
TCP Server takes on Modbus Slave features on Ethernet.
No protocol configuration is required other than configuring the Modbus mapping table. For
information on Modbus mapping, see
Modbus Mapping for Micro800 on page 261
.
With Connected Components Workbench software version 12 or later, the Modbus TCP Server is
disabled by default. If you want to use Modbus TCP, you can enable it from the Ethernet
settings.
CIP Symbolic Client/Server
CIP Symbolic is supported by any CIP-compliant interface including Ethernet (EtherNet/IP) and
serial port (CIP Serial). This protocol allows HMIs to easily connect to the Micro830/Micro850/
Micro870 controller.
Micro850 and Micro870 controllers support up to 16 simultaneous EtherNet/IP client
connections and 23 simultaneous EtherNet/IP Server connections.
CIP Serial, supported on Micro830, Micro850, and Micro870 controllers, makes use of DF1 Full-
Duplex protocol, which provides point-to-point connection between two devices.
DF1 Half-duplex Master, DF1 Half-Duplex Slave, and DF1 Radio Modem are supported in Micro850
(2080-L50E) and Micro870 (2080-L70E) controllers. These protocols provide connection to
multiple devices over RS-485 or radio modems.
Use MSG_MODBUS2 instruction to send Modbus TCP messages over
Ethernet port.