Campbell Scientific CR1000 Measurement and Control System - Manual (Page 10)

Table of Contents
10
7.7.3.4 Single-Line Declarations.................................................... 115
7.7.3.4.1 Variables................................................................... 115
7.7.3.4.2 Constants .................................................................. 122
7.7.3.4.3 Alias and Unit Declarations...................................... 124
7.7.3.5 Declared Sequences ........................................................... 125
7.7.3.5.1 Data Tables............................................................... 125
7.7.3.5.2 Subroutines ............................................................... 132
7.7.3.5.3 Incidental Sequences ................................................ 132
7.7.3.6 Execution and Task Priority............................................... 132
7.7.3.6.1 Pipeline Mode........................................................... 133
7.7.3.6.2 Sequential Mode....................................................... 134
7.7.3.7 Execution Timing............................................................... 135
7.7.3.7.1 Scan() / NextScan ..................................................... 136
7.7.3.7.2 SlowSequence / EndSequence.................................. 137
7.7.3.7.3 SubScan() / NextSubScan......................................... 137
7.7.3.7.4 Scan Priorities in Sequential Mode........................... 137
7.7.3.8 Instructions......................................................................... 139
7.7.3.8.1 Measurement and Data-Storage Processing.............. 139
7.7.3.8.2 Argument Types ....................................................... 140
7.7.3.8.3 Names in Arguments ................................................ 140
7.7.3.8.4 Expressions in Arguments ........................................ 141
7.7.3.8.5 Arrays of Multipliers and Offsets ............................. 141
7.7.3.9 Expressions ........................................................................ 142
7.7.3.9.1 Floating-Point Arithmetic......................................... 142
7.7.3.9.2 Mathematical Operations.......................................... 143
7.7.3.9.3 Expressions with Numeric Data Types..................... 143
7.7.3.9.4 Logical Expressions.................................................. 145
7.7.3.9.5 String Expressions .................................................... 147
7.7.3.10 Program Access to Data Tables ....................................... 148
7.7.3.11 System Signatures ............................................................ 150
7.7.4 Tips .............................................................................................. 150
7.7.4.1 Use of Variable Arrays to Conserve Code Space............... 150
7.7.4.2 Use of Move() to Conserve Code Space ............................ 150
7.8 Programming Resource Library ............................................................ 151
7.8.1 Calibration Using FieldCal() and FieldCalStrain()...................... 151
7.8.1.1 CAL Files........................................................................... 151
7.8.1.2 CRBasic Programming....................................................... 151
7.8.1.3 Calibration Wizard Overview ............................................ 152
7.8.1.4 Manual Calibration Overview............................................ 152
7.8.1.4.1 Single-Point Calibrations (zero, offset, or zero
basis) ................................................................................ 152
7.8.1.4.2 Two-point Calibrations (multiplier / gain)................ 153
7.8.1.5 FieldCal() Demonstration Programs .................................. 153
7.8.1.5.1 Zero or Tare (Option 0) ............................................ 154
7.8.1.5.2 Offset (Option 1) ...................................................... 155
7.8.1.5.3 Zero Basis (Option 4) ............................................... 157
7.8.1.5.4 Two-Point Slope and Offset (Option 2).................... 159
7.8.1.5.5 Two-Point Slope Only (Option 3) ............................ 161
7.8.1.6 FieldCalStrain() Demonstration Program .......................... 162
7.8.1.6.1 Quarter-Bridge Shunt (Option 13)............................ 165
7.8.1.6.2 Quarter-Bridge Zero (Option 10).............................. 165
7.8.2 Information Services.................................................................... 166
7.8.2.1 PakBus Over TCP/IP and Callback.................................... 167
7.8.2.2 Default HTTP Web Server................................................. 167
7.8.2.3 Custom HTTP Web Server ................................................ 168
7.8.2.4 FTP Server ......................................................................... 171