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Accuracy of the output frequency
The configured output frequency is output with a frequency-dependent accuracy at the digital
output PWM DQA. You can find an overview of the accuracy as a function of the frequency
used in the section Interconnection overview of the outputs (Page 109).The parameter "Output substitute
value" generates a substitute
value upon CPU STOP, which you
can define with the parameter
"Substitute value for pulse output
(DQA)".
Output substitute value Output substitute
value
The parameter "Continue" still
generates the frequency output
signal upon CPU STOP, which
was generated before the CPU
STOP.
Continue
Substitute value
for pulse output
(DQA)
If you have set the option "Output
substitute value" for "Reaction to
CPU STOP", the parameter "Substitute
value for pulse output
(DQA)" defines the substitute
value to be used for the pulse
output of the channel.
If you have set the option "Continue"
for "Reaction to CPU STOP",
the parameter "Substitute value for
pulse output (DQA)" cannot be
selectedNo supply voltage
L+
The parameter "Missing supply
voltage L+" activates the diagnostic
interrupt of the channel in the
case of no supply voltage L+
Deactivated Deactivated
Activated
Parameter High-speed output
(0.1 A)
The "High-speed output (0.1 A)"
parameter is used to specify
whether you want to use the selected
pulse output as high-speed
output. The requirement for this is
that the selected pulse output
supports operation as high-speed
output.
Deactivated
The output supports frequencies
of up to 10 kHz (load dependent)
and currents of up to 0.5 A or
frequencies of up to 100 Hz and
currents of up to 0.5 A depending
on the performance capability of
the selected output.
Deactivated
Activated
The output supports frequencies
of up to 100 kHz and currents of
up to 0.1 A.
Output format Defines the value for the frequency
output in the field
"OUTPUT_VALUE" of the control
interface of the channel.
1 Hz
Interprets the value of the frequency
output in the field
"OUTPUT_VALUE" as frequency
with the unit Hz.
1 Hz
Hardware
inputs/
outputs
Pulse output
(DQA)
The parameter "Pulse output
(DQA)" is used to define the hardware
output that you want to use
as pulse output channel.
For B:
X11, terminal 21 (DQ0 / %Q4.0):
10 kHz / 0.5 A or 100 kHz / 0.1 A
Hardware
output with
the least
significant
address For B:
X11, terminal 31 (DQ8 / %Q5.0):
100 Hz / 0.5 AContinuous pulse current at the digital
output PWM DQA
A pulse for the assigned frequency is output
at the digital output PWM DQA.
Continuous pulse currentThe PTO (Pulse Train Output) mode can be used to output position information. This allows
you to, for example, control stepper motor drives or simulate an incremental encoder. The
frequency of the pulses represents the speed, while the number of pulses represents the
distance. The direction can also be specified by using two signals per channel. You can use
a PTO channel for setpoint output (drive) for an axis technology object.
PTO mode is divided into the following four signal types:
● PTO (pulse (A) and direction (B)): If you select the PTO signal type (pulse (A) and
direction (B)), an output (A) controls the pulses and an output (B) controls the direction. B
is 'High' (active) when pulses are generated in a negative direction. B is 'Low' (inactive)
when pulses are generated in a positive direction.● PTO (A, B phase-shifted): When you select the PTO signal type (A, B phase-shifted), the
two outputs pulses with the specified velocity, but phase-shifted by 90 degrees. This is a
1x combination in which the pulse shows the duration between two positive transitions of
A. In this case, the direction is determined based on the output which first changes from 0
to 1. With positive direction, A precedes B. With negative direction B precedes A.