Siemens Simatic S7 Series

Program instructions
7.7 Pulse output
S7-200 SMART
254 System Manual, 09/2015, A5E03822230-AC
SM67.3 SM77.3 SM567.3 PWM time base:
• 0 = 1 µs/tick
• 1 = 1 ms/tick
SM67.4
SM77.4
SM567.4
Reserved
SM67.5 SM77.5 SM567.5 PTO single/multiple segment operation:
• 0 = Single
• 1 = Multiple
SM67.6 SM77.6 SM567.6 PTO/PWM mode select:
• 0 = PWM
• 1 = PTO
SM67.7 SM77.7 SM567.7 PWM enable:
• 0 = Disable
• 1 = Enable
Q0.0
Q0.1
Q0.3
Other registers
SMW68 SMW78 SMW568 PTO frequency or PWM cycle time value: 1 to 65,535 Hz (PTO); 2
to 65,535 (PWM)
SMW70
SMW80
SMW570
PWM pulse width value: 0 to 65,535
SMD72
SMD82
SMD572
PTO pulse count value: 1 to 2,147,483,647
SMB166 SMB176 SMB576 Number of the segment in progress:
Multiple-segment PTO operation only
SMW168 SMW178 SMW578 Starting location of the profile table (byte offset from V0):
Multiple-segment PTO operation only
Table 7- 11 PTO/PWM control byte reference
Result of executing the PLS instruction
Control
register
(Hex val-
ue)
Enable
Select
mode
PTO
Segment
operation
Time base
Pulse
count
Pulse
width
Cycle time
/ frequen-
cy
16#80
Yes
PWM
1 µs/cycle
16#81 Yes PWM 1 µs/cycle Update
cycle time
16#82
Yes
PWM
1 µs/cycle
Update
16#83 Yes PWM 1 µs/cycle Update Update
cycle time
16#88
Yes
PWM
1 ms/cycle
16#89 Yes PWM 1 ms/cycle Update
cycle time
16#8A
Yes
PWM
1 ms/cycle
Update
16#8B Yes PWM 1 ms/cycle Update Update
cycle time
16#C0
Yes
PTO
Single