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, and PWM2 high-speed outputs
S7-200 SMART
680 System Manual, 09/2015, A5E03822230-AC
Table D- 15 High-speed output 2 configuration and control
S7-200 SMART
symbol name
SM address
Description
PTO2_Status
SMB566
PTO2 Status
PLS2_Abort_AE SM566.4 PTO2 profile was aborted due to an add error: 0=no abort; 1=aborted
PLS2_Disable_UC SM566.5 PTO2 user manually disabled a PTO profile while it was running: 0=not
disabled; 1=manually disabled
PLS2_Ovr SM566.6 PTO2 pipeline overflow/underflow, loading pipeline while full or transfer-
ring an empty pipeline: 0=No overflow; 1=Pipeline overflow/underflow
PLS2_Idle
SM566.7
PTO2 idle: 0=PTO in progress; 1=PTO is idle
PLS2_Ctrl
SMB567
Monitor and control PTO2 (Pulse Train Output) and PWM2 (Pulse Width
Modulation) for Q0.3
PLS2_Cycle_Update SM567.0 PTO2/PWM2 update the cycle time or frequency value: 0=no update; 1=
write new cycle time/frequency
PWM2_PW_Update SM567.1 PWM2 update the pulse width value: 0=no update; 1= write new pulse
width
PTO2_PC_Update SM567.2 PTO2 update the pulse count value: 0=no update; 1= write new pulse
count
PLS2_TimeBase
SM567.3
PWM2 time base: 0=1 μs/tick, 1=1 ms/tick
SM567.4
Reserved
PTO2_Operation
SM567.5
PTO2 select single/multiple segment operation: 0=single; 1=multiple
PLS2_Select
SM567.6
PTO2/PWM2 mode select: 0=PWM; 1=PTO
PLS2_Enable
SM567.7
PTO2/PWM2 enable: 0=disable; 1=enable
PLS2_Cycle
SMW568
Word data type: PWM2 cycle time value (2 to 65,535 units of time base);
PTO2 frequency value (1 to 65,535 Hz)
PWM2_PW
SMW570
Word data type: PWM2 pulse width value (0 to 65,535 units of time base)
PTO2_PC
SMD572
Double Word data type: PTO2 pulse count value (1 to 2^31 - 1)
PTO2_Seg_Num
SMB576
Byte data type: The currently executing segment number for PTO2's
profile
PTO2_Profile_Offset
SMW578
Word data type: Starting location of PTO2'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.