EXTUAL INTERC E NGINEERING C ROSS REFERENCE 27 3 PCS

Extual interc e ngineering c ross reference 27 3 pcs

This preview shows page 207 - 211 out of 639 pages.

EXTUAL INTERCONNECTION ........................................................................................................ 23 2.7 E NGINEERING UNIT ....................................................................................................................... 25 2.8 C ROSS - REFERENCE ....................................................................................................................... 27 3. PCS 7 LIBRARY FUNCTIONS ...................................................................................................... 29 3.1 O PERATOR CONTROL BLOCKS ....................................................................................................... 29 3.1.1 OP_D, FB48 ......................................................................................................................... 29 3.1.2 OP_D3, FB49 ....................................................................................................................... 31 3.1.3 OP_A_LIM, FB46 ................................................................................................................. 33 3.2 M OTOR AND V ALVE CONTROL ...................................................................................................... 35 3.2.1 Motor control, FB66 ............................................................................................................. 35 3.2.2 Valve Control, FB73 ............................................................................................................. 37 3.3 PID AND DOSING CONTROL ........................................................................................................... 42 3.3.1 PID Controller, FB61 ........................................................................................................... 42 3.3.2 Dosing control with DOSE block, FB63 ............................................................................... 46 3.4 M ESSAGE BLOCKS ......................................................................................................................... 49 3.4.1 Block, ALARM_8P (SFB35) .................................................................................................. 50 3.4.2 MESSAGE, FB43 .................................................................................................................. 54 3.4.3 MEAS_MON, FB65 .............................................................................................................. 55 3.4.4 DIG_MON, FB62 .................................................................................................................. 57 3.5 I NTERLOCK CONTROL , B LOCK INTERLOK .................................................................................. 58 4. CONTROL OF A RAW MATERIAL TANK UNIT ..................................................................... 61 4.1 T HE R AW M ATERIAL T ANK U NIT ................................................................................................. 61 4.1.1 Function description ............................................................................................................. 61 4.1.2 Operational procedure ......................................................................................................... 61 4.1.3 Operating modes ................................................................................................................... 62 4.2 S IMULATION OF THE RAW MATERIAL TANK UNIT .......................................................................... 63 4.2.1 Design of SIM_mot ............................................................................................................... 64 4.2.2 Design of SIM_val ................................................................................................................ 65 4.2.3 Design of SIM_lel ................................................................................................................. 65 LAB PROJECT RMT1 (PART1): DESIGNING CONTROLS FOR THE RMT1 UNIT ............. 67 1. T HE T ASK ....................................................................................................................................... 67
Image of page 207
2. G UIDELINE ...................................................................................................................................... 67 2.1 The starting point ..................................................................................................................... 67 2.2 Project functional objects ........................................................................................................ 67 2.3 Plant hierarchy and tag naming .............................................................................................. 68 2.4 CFC charts and pictures .......................................................................................................... 69 2.5 Deriving block icons ................................................................................................................ 70 2.6 The simulation charts ............................................................................................................... 70 2.7 Designing Valve Controller, NK111 chart .............................................................................. 70 2.8 Designing Motor Controller, NP111 ....................................................................................... 71 2.9 Measuring the tank level, L111 ................................................................................................ 72 2.10 Flow-rate and dosing control, FC111 ................................................................................... 73 2.11 Block instances’ names .......................................................................................................... 75 2.12 Runtime sequence .................................................................................................................. 75 2.13 Compiling Program ............................................................................................................... 76 2.14 Compiling OS ......................................................................................................................... 76 2.15 Testing ................................................................................................................................... 77 APPENDIX VALVE AND MOTOR CONTROL TEMPLATES .................................................... 79
Image of page 208
PCS 7 PoT Chapter 6 Continuous Control - CFC Chapter 6 Continuous Control – CFC CFC (Continuous Function Chart) deals with automation and control functions. Functions are represented in the CFC editor in the form of graphical blocks. In the CFC editor, you work with ready-made blocks that have a specific function. You place these function blocks in a chart, interconnect them, and assign parameters to them. 1. Block concept 1.1 Block type Block types are ready-made program sections that can be inserted in a CFC chart. When a block type is inserted, a block instance is created. You can create any number of block instances from a block type. For the SIMATIC S7 CPUs, the block types are created, edited, and compiled in the Ladder Logic editor (LAD), Statement List (STL) editor or Structured Control Language (SCL) editor. For PCS 7 projects, function blocks are created in the SCL or by compiling charts as blocks. Block types of a project are located in the Blocks folder as shown in Picture 6.1. Blocks folder also contains other blocks, e.g. system function blocks (SFB), data blocks (DB), and organisation blocks (OB). Picture 6.1: Block types and the Blocks folder PCS 7 PoT V6.0 | Edition V1.0 | August 2003 Copyright 2003 Siemens AG by A&D AS CS2 PA. All rights reserved. Page 6 - 1
Image of page 209
PCS 7 PoT Chapter 6 Continuous Control - CFC The block type determines the characteristics (algorithm) for all implementations of this type. The name of the block is usually entered in the Symbols table or Symbols editor. In Picture 6.1, a block type, FB73, has a symbolic name VALVE, which is defined in the Symbols table as shown in Picture 6.2.
Image of page 210
Image of page 211

You've reached the end of your free preview.

Want to read all 639 pages?

  • Summer '09
  • ramana rao
  • Windows 2000, Siemens AG

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes