Operating Mode: Frequency Output - Siemens Simatic S7-1500 Manual

Output signals for pulse width modulation (PWM) mode
Output signal
Continuous pulse current at the digital
output PWM DQA
3.2.1.2

Operating mode: Frequency output

In this operating mode you can assign a frequency value with high frequencies more
precisely than by using period duration in PWM mode.
A rectangular signal with an assigned frequency and a constant on-load factor of 50 % is
generated at the digital output.
The frequency output mode has the following functions:
● When the option "High-speed output (0.1 A)" is activated, you can generate a minimum
pulse duration of 2 μs at a current of 100 mA. If the option "High-speed output (0.1 A)" is
not activated, you can generate a minimum pulse duration of 20 μs with a load > 0.1 A
and a minimum pulse duration of 40 μs with a load of ≥ 2 mA and a current of
maximum 0.5 A.
If you use a standard output, you can generate a minimum pulse duration of 100 µs with
a load of > 0.1 A and a minimum pulse duration of 200 µs with a load of ≥ 2 mA and a
current of max. 0.5 A.
Standard out-
put
Frequency
Load dependent
1)
● You can control the pulse output (DQA) of the channel manually via the control and
feedback interface.
● You can configure the reaction to CPU STOP. Upon change to CPU STOP, the pulse
output (DQA) is set to the configured state.
CPU 1512C-1 PN (6ES7512-1CK00-0AB0)
Manual, 09/2016, A5E35306440-AB
Meaning
A pulse is output at the digital output PWM
DQA for the set on-load factor and cycle
duration.
Minimum
High-speed High-speed
output deac- output activated
tivated
0.1 Hz
Value range
Continuous pulse current
Maximum
Standard out- High-speed
put output deac-
tivated
100 Hz 10 kHz
1)
Technology functions
3.2 Pulse generators
High-speed
output activated
100 kHz
1)
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