Siemens SIMATIC S7 - Page 292

Program instructions
7.7 Pulse output
S7-200 SMART
292 System Manual, V2.3, 07/2017, A5E03822230-AF
Table 7- 17 SM locations for the PTO/PWM control registers
Q0.0
Q0.1
Q0.3
Status bits
SM66.4 SM76.4 SM566.4 PTO delta calculation error (due to an add error):
• 0 = No error
• 1 = Aborted due to error
SM66.5 SM76.5 SM566.5 PTO profile disabled (due to user command):
• 0 = Profile not manually disabled
• 1 = User disabled profile
SM66.6 SM76.6 SM566.6 PTO/PWM pipeline overflow/underflow:
• 0 = No overflow/underflow
• 1 = Overflow/underflow
SM66.7 SM76.7 SM566.7 PTO idle:
• 0 = In progress
• 1 = PTO idle
Q0.0
Q0.1
Q0.3
Control bits
SM67.0 SM77.0 SM567.0 PTO/PWM update the frequency/cycle time:
• 0 = No update
• 1 = Update frequency/cycle time
SM67.1 SM77.1 SM567.1 PWM update the pulse width time:
• 0 = No update
• 1 = Update pulse width
SM67.2 SM77.2 SM567.2 PTO update the pulse count value:
• 0 = No update
• 1 = Update pulse count
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)