Rockwell Automation 1753-L28BBB-M_P GuardPLC 1600 Controllers - Manual (Page 13)

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Rockwell Automation Publication 1753-IN001C-EN-P - June 2010
OPC Server
The GuardPLC 1600 controller is an OPC client. An OPC server, catalog number 1753-OPC,
is available from Rockwell Automation and lets computer applications read and write data to and
from the GuardPLC controller.
MAC Address
The media access control (MAC) address of the controller can be found on the label positioned
over both lower RJ45 connections.
Connections for Nonsafety-related Communication
The three 9-pin D-shell connectors on the front of the controller provide the following
communication options.
The pin assignments of the D-shell connector are listed in this table.
IP Address and System ID (SRS)
A transparent label provided with the controller can be used to note the IP address and system
ID (SRS). The default value for the IP address is 192.168.0.99. The default SRS is 60000.
Designation Function
COMM1 (RS-485) Modbus Slave (1753-L28BBB-M)
Profibus-DP-Slave (1753-L28BBB-P)
COMM2 Not used
COMM3 (RS-485) GuardPLC ASCII protocol
Connection Signal Function
1 — —
2 RP 5V, decoupled with diodes
3 RxD/TxD-A Receive/transmit data A
4 CNTR-A Control signal A
5 DGND Data reference potential
6 VP 5V, positive pole of supply voltage
7 — —
8 RxD/TxD-B Receive/transmit data B
9 CNTR-B Control signal B
IMPORTANT If you attach the label to the controller, make sure you do not cover any of the
ventilation slots.