Siemens Simatic S7 Series System Manual

Table of contents
S7-200 SMART
14 System Manual, 09/2015, A5E03822230-AC
D Special memory (SM) and system symbol names ................................................................................. 665
D.1 SM (Special Memory) overview ........................................................................................... 665
D.2 SMB0: System status ........................................................................................................... 667
D.3 SMB1: Instruction execution status...................................................................................... 668
D.4 SMB2: Freeport receive character ....................................................................................... 669
D.5 SMB3: Freeport character error ........................................................................................... 669
D.6 SMB4: Interrupt queue overflow, run-time program error, interrupts enabled, freeport
transmitter idle, and value forced ......................................................................................... 670
D.7 SMB5: I/O error status ......................................................................................................... 670
D.8 SMB6-SMB7: CPU ID, error status, and digital I/O points ................................................... 671
D.9 SMB8-SMB19: I/O module ID and errors ............................................................................ 672
D.10 SMW22-SMW26: Scan times .............................................................................................. 673
D.11 SMB28-SMB29: Signal board ID and errors ........................................................................ 673
D.12 SMB30: (port 0) and SMB130: (port 1) ................................................................................ 674
D.13 SMB34-SMB35: Time intervals for timed interrupts ............................................................. 674
D.14 SMB36-45 (HSC0), SMB46-55 (HSC1), SMB56-65 (HSC2), SMB136-145 (HSC3):
high-speed counters ............................................................................................................ 675
D.15 SMB66-SMB85, SMB166-SMB169, SMB176-SMB179, and SMB566-SMB579: PTO0,
PWM0, PTO1, PWM1, PTO2, and PWM2 high-speed outputs ........................................... 678
D.16 SMB86-SMB94 and SMB186-SMB194: Receive message control ..................................... 681
D.17 SMW98: I/O expansion bus communication errors ............................................................. 683
D.18 SMW100-SMW114 System alarms ..................................................................................... 684
D.19 SMB130: Freeport control for port 1 (See SMB30) .............................................................. 685
D.20 SMB136-SMB145: HSC3 high-speed counter ..................................................................... 685
D.21 SMB186-SMB194: Receive message control (See SMB86-SMB94) .................................. 685
D.22 SMB480-SMB515: Data log status ...................................................................................... 685
D.23 SMB600-SMB749: Axis (0, 1, and 2) open loop motion control .......................................... 686
D.24 SMB650-SMB699: Axis 1 open loop motion control (See SMB600-SMB740) .................... 687
D.25 SMB700-SMB749: Axis 2 open loop motion control (See SMB600-SMB740) .................... 687
D.26 SMB1000-SMB1049: CPU hardware/firmware ID ............................................................... 688
D.27 SMB1050-SMB1099: SB (signal board) hardware/firmware ID ........................................... 688
D.28 SMB1100-SMB1399: EM (expansion module) hardware/firmware ID ................................ 689
D.29 SMB1400-SMB1699: EM (expansion module) module-specific data .................................. 691

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.