Siemens Simatic S7 Series System Manual

Special memory (SM) and system symbol names
D.15 SMB66-SMB85, SMB166-SMB169, SMB176-SMB179, and SMB566-
SMB579: PTO0, PWM0, PTO1, PWM1, PTO2,
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
679
S7-200 SMART
symbol name
SM address
Function
PTO0_Operation
SM67.5
PTO0 select single/multiple segment operation: 0=single; 1=multiple
PLS0_Select SM67.6 PTO0/PWM0 mode select: 0=PWM; 1=PTO
PLS0_Enable
SM67.7
PTO0/PWM0 enable: 0=disable; 1=enable
PLS0_Cycle
SMW68
Word data type: PWM0 cycle time value (2 to 65,535 units of time base);
PTO0 frequency value (1 to 65,535 Hz)
PWM0_PW
SMW70
Word data type: PWM0 pulse width value (0 to 65,535 units of time base)
PTO0_PC
SMD72
Double Word data type: PTO0 pulse count value (1 to 2^31 - 1)
PTO0_Seg_Num
SMB166
Byte data type: The currently executing segment number for PTO0's
profile
PTO0_Profile_Offset
SMW168
Word data type: Starting location of PTO0's profile table (byte offset from
V0)
Table D- 14 High-speed output 1 configuration and control
S7-200 SMART
symbol name
SM address
Function
PTO1_Status
SMB76
PTO1 Status
PLS1_Abort_AE
SM76.4
PTO1 profile was aborted due to an add error: 0=no abort; 1=aborted
PLS1_Disable_UC SM76.5 PTO1 user manually disabled a PTO profile while it was running: 0=not
disabled; 1=manually disabled
PLS1_Ovr SM76.6 PTO1 pipeline overflow/underflow, loading pipeline while full or transfer-
ring an empty pipeline: 0=No overflow; 1=Pipeline overflow/underflow
PLS1_Idle
SM76.7
PTO1 idle: 0=PTO in progress; 1=PTO is idle
PLS1_Ctrl
SMB77
Monitor and control PTO1 (Pulse Train Output) and PWM1 (Pulse Width
Modulation) for Q0.1
PLS1_Cycle_Update SM77.0 PTO1/PWM1 update the cycle time or frequency value: 0=no update; 1=
write new cycle time/frequency
PWM1_PW_Update SM77.1 PWM1 update the pulse width value: 0=no update; 1= write new pulse
width
PTO1_PC_Update SM77.2 PTO1 update the pulse count value: 0=no update; 1= write new pulse
count
PWM1_TimeBase
SM77.3
PWM1 time base: 0=1 μs/tick, 1=1 ms/tick
SM77.4
Reserved
PTO1_Operation
SM77.5
PTO1 select single/multiple segment operation: 0=single; 1=multiple
PLS1_Select
SM77.6
PTO1/PWM1 mode select: 0=PWM; 1=PTO
PLS1_Enable
SM77.7
PTO1/PWM1 enable: 0=disable; 1=enable
PLS1_Cycle
SMW78
Word data type: PWM1 cycle time value (2 to 65,535 units of time base);
PTO1 frequency value (1 to 65,535 Hz)
PWM1_PW
SMW80
Word data type: PWM1 pulse width value (0 to 65,535 units of time base)
PTO1_PC
SMD82
Double Word data type: PTO1 pulse count value (1 to 2^31 - 1)
PTO1_Seg_Num
SMB176
Byte data type: The currently executing segment number for PTO1's
profile
PTO1_Profile_Offset
SMW178
Word data type: Starting location of PTO1's profile table (byte offset from
V0)

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.