model 2704 controller installation and operation handbook - Soliton

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Digital Communications 2704 Controller 16. Chapter 16 Digital Communications 16.1. WHAT IS DIGITAL COMMUNICATIONS? Digital Communications (or ‘comms’ for short) allows the controller to communicate with a PC or a networked computer system. A choice of comms protocol is available and can be selected in configuration level. These are MODBUS (or JBUS), EIBisynch, and Profibus. Comms modules can be fitted which use RS232, RS485 or RS422 Transmission Standards. A full description of these standards is given in the 2000 series Communications Handbook, part number HA026230. Comms modules can be fitted into either or both of two positions referred to as the H slot and the J slot which correspond to the rear terminal connections, see also section 2.4. Both slot positions may be used at the same time. An example is, to allow a multi-drop connection between a number of controllers and a computer running, say, a SCADA package on one comms position, and a separate PC used for configuration purposes on the second comms position. In this example an RS485 module may be fitted for the multi-drop/SCADA requirement and RS232 in the second position for the single PC/configuration requirement. Note: When the controller is placed into Configuration Level it is taken ‘off line’ and placed into a standby state. In this state it no longer monitors or controls the plant. 16-2 Installation and Operation Handbook. Part No HA026502 Issue 1.0 Apr-00
2704 Controller Digital Communications 16.2. TO SET COMMUNICATIONS ADDRESS AND RESOLUTION Parameters in the Comms page allow you to set up the Address and Resolution. The operation of the H and J Modules is the same. Do This 1. From any display press as many times as necessary to access the page header menu This Is The Display You Should See Additional Notes 2. Press or to select ‘COMMS’ 3. Press to show Subheaders 4. Press or to select ‘H Module’ Digital communications modules may be fitted in either one or both positions. 5. Press to show the list of comms parameters. 6. Press again to select ‘Address’ Up to 254 addresses can be set in level 1 7. Press or to change the instrument address 8. Press to select further parameters 9. Press or to change a parameter value where applicable Choices are:- Full Integer Level 3 Modbus EIBisynch OR Profibus EI Bisynch (f ordered) Level 3 Read only Installation and Operation Handbook. Part No HA026502 Issue 1.0 Apr-00 16-3
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2704 Controller Contents MODEL 2704
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model 2704 controller installation and operation handbook - Soliton

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