User`s guide

Page 1

Controlinc 1746-C (Version 5.21) Network Master Users Guide (2004-11-18)

0. Quick Start Information

1. As a minimum, you should have access to the following reference documents:

• This manual (1746-C User’s Guide)

• Allen-Bradley SLC-500 BASIC User's Manual (1746-BAS & 1746-BAS-T)

Publication No. 1746-UM004A-US-P 2000

• EIM Controlinc 320A Quick Startup Guide, Rev. F or later

• EIM Controlinc 320B Quick Startup Guide, Rev. A or later

2. Refer to Section 2 of this manual on how the jumpers should be set on the BASIC module.

3. The 1746-C module comes from EIM pre-programmed with the network master program in it. However, if

for some reason the module needs to be flashed again (ex: a field upgrade) then refer to Section 5 on

installing the firmware in the module.

Note: Remember, you will need to connect a serial cable between the 1746-C and the computer. The

correct cable is a Null Modem Cable

connected between the PRT1 port (top DB9 connector on

the module) and the serial communications port on the computer used for the upload.

4. Ensure the PLC rack power is turned off.

Install the module in the correct slot in the PLC rack. Connect all cables and power the system up.

5. The PLC-RLL will start interfacing with the 1746-C after the 1746-C performs initial scans of the network

on power up.

NOTES: To ensure optimal performance, some things the PLC should do …

1. Ensure table [0] is set correctly and repeated in a timely manner. Allow for frequent table [0] read backs.

2. Restrict the rate of data writes to the actuators … only write as fast as required to adequately control the

valve.

(cuts down on the interruptions to scanning the network … gathering data)

3. Expedite responses to M1 transfer requests made by the 1746-C. Delaying them can slow 1746-C

operations.

4. Only activate writing to or reading from tables if actually in use (or when needed).

(ex: do not write to the analog output table if analog outputs are not used)

(ex: do not read totalizer data if its not being used)

(ex: only poll for “static” [non-changing] data one time and stop)

(prevents unnecessary delays to gathering the more important data from the network)

Remember:

The 1746-C uses explicit read/write commanding of the tables such that if word [1] in any table is

zero (0) then it is a table read request by the PLC. Otherwise, the command is a table write

command.