GE VersaMax PLC - Page 14

13.4.7 Data Types for Ethernet Global Data..................................................................................................258
13.4.8 Effect of PLC Modes and Actions on Ethernet Global Data ....................................................................259
13.4.9 EGD Synchronization .....................................................................................................................259
13.5 Diagnostic Tools...................................................................................................................................261
13.5.1 What to do if you Cannot Solve the Problem .......................................................................................261
13.5.2 Checking the Ethernet LEDs ............................................................................................................261
13.5.3 Using the PLC Fault Table ...............................................................................................................264
13.5.4 Checking the Status of the Ethernet Interface.......................................................................................265
13.5.5 Checking the Status of an Ethernet Global Data Exchange .....................................................................266
13.5.6 Using the Ethernet Station Manager Function ......................................................................................268
13.6 Troubleshooting Common Ethernet Difficulties ..........................................................................................269
13.6.1 PLC Timeout Errors .......................................................................................................................269
13.6.2 Unexpected Ethernet Restart or Runtime Errors ...................................................................................270
13.6.3 EGD Configuration Mismatch Errors .................................................................................................271
13.6.4 Receive Resource Exhaustion Errors..................................................................................................271
13.6.5 Station Manager Lockout under Heavy Load .......................................................................................272
13.6.6 PING Restrictions ..........................................................................................................................272
13.6.7 SRTP Connection Timeout...............................................................................................................272
14 PID Built-in Function Block .....................................................................................................273
14.1 Operands of the PID Function .................................................................................................................274
14.1.1 Parameters of the PID Function Block................................................................................................274
14.2 Reference Array for the PID Function.......................................................................................................275
14.2.1 Scaling Input and Outputs................................................................................................................275
14.2.2 Reference Array Parameters.............................................................................................................275
14.3 Operation of the PID Function.................................................................................................................282
14.3.1 Automatic Operation ......................................................................................................................282
14.3.2 Manual Operation ..........................................................................................................................282
14.3.3 Time Interval for the PID Function ....................................................................................................283
14.4 PID Algorithm Selection (PIDISA or PIDIND) and Gain Calculations ............................................................284
14.4.1 Error Term....................................................................................................................................284
14.4.2 Derivative Term.............................................................................................................................285
14.4.3 CV Bias Term ...............................................................................................................................285
14.4.4 CV Amplitude and Rate Limits .........................................................................................................286
14.4.5 Sample Period and PID Function Block Scheduling ..............................................................................287
14.5 Determining the Process Characteristics....................................................................................................288
14.6 Setting Tuning Loop Gains .....................................................................................................................289
14.6.1 Basic Iterative Tuning Approach .......................................................................................................289
14.6.2 Setting Loop Gains Using the Ziegler and Nichols Tuning Approach .......................................................289
14.6.3 Ideal Tuning Method ......................................................................................................................290
14.6.4 Example.......................................................................................................................................290
15 The EZ Program Store Device.................................................................................................293
15.1 Read/Write/Verify Data with a Programmer Present ....................................................................................295
15.1.1 Including All the Necessary Information.............................................................................................295
15.1.2 Matching OEM Protection ...............................................................................................................295
15.1.3 Adjusting the Configuration Timeouts................................................................................................295
15.1.4 Writing Data to RAM or Flash..........................................................................................................296
14 GFK-1503E VersaMax PLC User Manual
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