Browse Categories by programmable logic controllers

Tip of the Month: Integrating MicroLogix to Catalyst via Modbus Protocol Over RS485

Posted by jBrown on Tue, Jul 26, 2011 @ 7:23 AM

When setting up the Modbus RTU Master/Slave over an RS485 network, a three-wire cable is required to connect back to the interface converter. The Simple NULL Modem cable with external +24 vdc power is recommended, but the Allen-Bradley 1761-CBL cable is also functional. To begin, plug the cable to the round eight-pin mini DIN receptacle and set the P10 Jumpers for RS-485 on the Catalyst. Parametric changes are also required within the RSLogix 500 and Alarmware to synchronize the Modbus Drivers. Here are the steps: 1. Connect the MicroLogix to your PC using the required 1761-CBL cable ... Continue Reading

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Tip of the Month: Integrating MicroLogix to Verbatim Gateway via Modbus Protocol over RS232

Posted by jBrown on Tue, Jul 12, 2011 @ 4:20 AM

The Verbatim Gateway system—interfaced with an Allen-Bradley MicroLogix family of PLCs containing a native Modbus RTU Slave driver—performs alarm and monitoring functions with existing wiring to PLCs as inputs via data communications. In order to facilitate data communications via Modbus RTU Master/Slave over RS232 data interface, RACO provides a NULL Modem serial cable, VAB-1. This cable has the RJ-45 connector required for the system. Below are instructions on how to integrate MicroLogix to Verbatim Gateway via Modbus Protocol over RS232. Communication setup for Allen-Bradley Mi... Continue Reading

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Tip of the Month: Connecting Verbatim Gateway to CompactLogix PLC

Posted by jBrown on Fri, May 20, 2011 @ 12:13 PM

Verbatim Gateway autodialers can be connected via DF1 to any of Allen-Bradley’s CompactLogix family of PLCs, which have a 9 PIN, male RS232 port. The following tips will help you get started. 1. Prepare your equipment: You will need a Verbatim Gateway autodialer and 510VAB-1 cable, supplied by RACO, and a CompactLogix PLC, RS232 cable and RSLogix software, supplied by Allen-Bradley. 2. Set up CompactLogix communications: Launch the RSLogix software, then use the tabs to set up the serial and system protocol. Next, configure the CompactLogix base tags. Map the tags to the SLC platform ... Continue Reading

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RACO’s Verbatim Gateway System

Posted by jBrown on Tue, Feb 15, 2011 @ 11:40 AM

RACO’s Verbatim Gateway system puts pump station alarm monitoring and reporting for water and wastewater treatment plants right at your fingertips. Programming, status checks and alarm notification are all done through the phone. The system is compatible with programmable logic controllers (PLCs) and PC-based HMI/SCADA systems, and can monitor up to 144 points at once. It can even monitor multiple PLCs on multiple networks and provide communication between networks that are incompatible. Pump station personnel can communicate with the Verbatim Gateway system via a phone, cell phone or ... Continue Reading

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