TI 34P02K35-02E
Jun. 6, 2018-00
8.3 Precautions about Multi-tasking .......................................................... 137
8.4 Criteria for Selecting Programming Languages in Logic Designer .. 141
8.4.1 Selection Criteria for FBD, LD and ST ........................................ 141
8.4.2 Selecting between FBD and LD .................................................. 149
8.4.3 Combining FBD, LD and ST ....................................................... 150
8.4.4 Selecting between SFC and Stepped FBD or LD ....................... 152
9. Advanced Engineering ................................................................ 156
9.1 General Application Development Know-how ..................................... 156
9.1.1 Variable Definitions ..................................................................... 156
9.1.2 Local Variables versus Global Variables ..................................... 157
9.1.3 _RB and _BOOL Suffix Variables of Device Label Variables ...... 160
9.1.4 Execution Order of Control Application ....................................... 162
9.1.5 Inter-FCN/FCJ Communication Concept .................................... 169
9.1.6 How to Create User Data Types ................................................. 175
9.1.7 Jump, Connector and Return Functions ..................................... 178
9.1.8 Cross References ....................................................................... 182
9.1.9 Specifying Retain Data and OPC Property ................................. 185
9.1.10 Getting FCN-500, FCN-RTU Time .............................................. 186
9.1.11 Precautions When Using Terminal EN of Functions ................... 187
9.1.12 Logic for Saving Retain Data ...................................................... 190
9.1.13 Comparing Logic Designer Projects ........................................... 192
9.1.14 Avoidance of the Error during Execution .................................... 193
9.2 Know-how in Use of NPAS_POU .......................................................... 194
9.2.1 Scan Cycle and Control Cycle .................................................... 194
9.2.2 How to Detect Mode, Status and Alarm ...................................... 197
9.2.3 NPAS_POU Status Propagation ................................................. 202
9.2.4 Blocked NPAS_POU Status Propagation ................................... 207
9.2.5 Selection of Timers and Counters ............................................... 210
9.2.6 Engineering Parameters .............................................................. 211
Appendix 1 STARDOM Engineering Flow Chart ............................... 214
Revision Information ................................................................................. i
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