Siemens Simatic S7 Series System Manual

Table of contents
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
11
9.3.3.4 Modbus slave execution error codes .................................................................................... 448
9.3.4 Modbus master example program ........................................................................................ 448
9.3.5 Modbus advanced user information ...................................................................................... 450
10 Debugging and troubleshooting ............................................................................................................. 453
10.1 Debugging your program ...................................................................................................... 453
10.1.1 Bookmark functions .............................................................................................................. 453
10.1.2 Cross reference table ........................................................................................................... 454
10.2 Displaying program status .................................................................................................... 456
10.2.1 Displaying status in the program editor ................................................................................ 456
10.2.2 Configuring the STL status options ....................................................................................... 459
10.3 Using a status chart to monitor your program ...................................................................... 460
10.4 Forcing specific values ......................................................................................................... 462
10.5 Writing and forcing outputs in STOP mode .......................................................................... 463
10.6 How to execute a limited number of scans ........................................................................... 464
10.7 Hardware troubleshooting guide ........................................................................................... 465
11 PID loops and tuning ............................................................................................................................. 467
11.1 PID loop definition table ........................................................................................................ 468
11.2 Prerequisites ......................................................................................................................... 472
11.3 Auto-hysteresis and auto-deviation ...................................................................................... 472
11.4 Auto-tune sequence .............................................................................................................. 473
11.5 Exception conditions ............................................................................................................. 475
11.6 Notes concerning PV out-of-range (result code 3) ............................................................... 476
11.7 PID Tune control panel ......................................................................................................... 476
12 Open loop motion control ....................................................................................................................... 481
12.1 Using the PWM output .......................................................................................................... 482
12.1.1 Configuring the PWM output ................................................................................................. 482
12.1.2 PWMx_RUN subroutine ........................................................................................................ 483
12.2 Using motion control ............................................................................................................. 485
12.2.1 Maximum and start/stop speeds ........................................................................................... 485
12.2.2 Entering the acceleration and deceleration times ................................................................. 486
12.2.3 Configuring the motion profiles ............................................................................................. 487
12.3 Features of motion control .................................................................................................... 490
12.4 Programming an Axis of Motion ............................................................................................ 492
12.5 Configuring an Axis of Motion ............................................................................................... 493
12.6 Subroutines created by the Motion wizard for the Axis of Motion ........................................ 506
12.6.1 Guidelines for using the Motion subroutines ........................................................................ 507
12.6.2 AXISx_CTRL subroutine ....................................................................................................... 507
12.6.3 AXISx_MAN subroutine ........................................................................................................ 509
12.6.4 AXISx_GOTO subroutine ...................................................................................................... 510
12.6.5 AXISx_RUN subroutine ........................................................................................................ 512
12.6.6 AXISx_RSEEK subroutine .................................................................................................... 513

Siemens Simatic S7 Series Specifications

General

CPU	Varies by model (e.g., S7-300, S7-400, S7-1200, S7-1500)
Communication Interfaces	PROFIBUS, PROFINET, Ethernet, MPI
Programming	TIA Portal, STEP 7
Programming Languages	LAD, FBD, STL, SCL, GRAPH
I/O Modules	Digital, Analog, Specialty modules available
Operating Temperature	0°C to 60°C (standard models)
Mounting	DIN rail mounting
Operating Voltage	24V DC or 120/230V AC (varies by model)
Protection Class	IP20 (standard models)
Memory	Varies depending on the S7 model. Includes work memory (RAM) for program execution, load memory (EEPROM or Flash) for program storage, and system memory for operating system functions. Memory sizes range from kilobytes to megabytes.