Connecting the MLC 9000 to the Allen Bradley

Connecting the MLC 9000 to the Allen Bradley SLC 500 via Modbus Tuesday, March 28, 2000

Equipment and Software Needed • MLC 9000 BCM with Modbus and appropriate number LCM’s • AB SLC 5/03 CPU or higher, Power Supply and Rack -5/03 is smallest CPU to support M 0/M 1 file transfer • Pro. Soft MCM 3150 Modbus Communications Card • RSLogix 500 Programming Software for SLC 500 • Programming Cable for SLC 500 • West. RSS Driver File • Communication Cable between MLC 9000 and MCM 3150 Card

SLC 500 Backplane Communications Basics n SLC 500 is a modular PLC – n Racks can be configured with a wide variety of modules PLC CPU receives information from modules in rack via one of two ways – I/O Transfer n – Used with Analog or Digital I/O Modules where small amounts of information are being passed Block Transfer via M 0/M 1 Files n Used for large blocks of data n M 0/M 1 files are local to the module n Information must be transferred form M 0/M 1 files into usable registers – Process is known as Block Transfer

SLC 500 Backplane Communications Basics M 0 M 1 . . . Integer File . . . Block Transfer Example Integer File . . .

Setting Up the Pro. Soft 3150 -MCM • Verify Jumpers are in position for RS 485 2 -Wire (Factory Default)

Setting Up Communications between PC and SLC 500 • From Start Menu, start RSLinx under Rockwell Software • Under Communications, select Configure drivers

Setting Up Communications between PC and SLC 500 • From Available Driver Types select 1747 -PIC/AIC+ Driver

Setting Up Communications between PC and SLC 500 • Set station number to 31, pick open comm. port on PC

Setting Up Communications between PC and SLC 500 • Close window then reboot PC to start driver

Loading the Driver for the 3150 -MCM From Start Menu, load RSLogix 500

Loading the Driver for the 3150 -MCM Select File, then Open and select the directory that West. RSS is stored in.

Loading the Driver for the 3150 -MCM

Loading the Driver for the 3150 -MCM • From Menu Bar on Left, Double-Click on IO Configuration • Verify Configuration for correct number of racks and position of modules

Loading the Driver for the 3150 -MCM • From Menu on left, under Data Files, double-click on N 255 West • Adjust N 255: 110 to the proper number of loops in the system

Loading the Driver for the 3150 -MCM • N 255: 111 -N 255: 142 Contain the Modbus Addresses for up to 32 loops • Adjust these files to match Modbus Addresses of LCM’s

Loading the Driver for the 3150 -MCM • To begin download, first go to communications menu and select System Comms

Loading the Driver for the 3150 -MCM • Select PLC to download program to • Select Download

Loading the Driver for the 3150 -MCM • Select OK to begin download

Loading the Driver for the 3150 -MCM Press Yes to Go Online

Completing Communications between 3150 MCM and MLC 9000 to Pro. Soft 3150 -MCM Cable Pin-out (RS 485) 3150 -MCM MLC 9000 9 5 (A) 1 4 (B) 5 3 (GND) 7 8

Diagnostics on 3150 -MCM • Eight indicator lights on module used as communications diagnostics

MLC 9000 Parameters • N 250 File used to hold parameters read from MLC 9000 loops 1 -16 • N 250: XXX-address of parameter to be accessed • Read-Only data, to be used by PLC or HMI for reference • File N 251 used for loops 17 -32

MLC 9000 Parameters • Alarm Words are broken down into sixteen read accessible bits • Bits are accessed through address format N 250: XXX/XX

MLC 9000 Parameters • N 254 File used for data to be written to MLC 9000 • N 254: XXX-address format used for accessing write data • Data has Read/Write capabilities, can be manipulated by PLC or HMI

MLC 9000 Parameters • Control Bits are broken down into 16 Read/Write bits • Parameters are addressed in N 254: XXX/XX format