100 Hz)The PTO channel reacts to a change to CPU STOP with the removal of the drive enable (to
the extent that the drive enable output is configured) and with output of the velocity setpoint
0 at the hardware outputs configured for the signal tracks A and B. The CPU STOP reaction
of the PTO channels cannot be configured.
Upon CPU STOP, the hardware outputs assigned for the PTO outputs A and B can switch to
signal state 'High' (1) and/or remain there. A switching/remaining of the two hardware
outputs to/in signal level 'Low' (0) is not guaranteed.
Controller
The pulse output channels for the four modes of the pulse generators (PTO) are controlled
using Motion Control via the technology objects TO_SpeedAxis, TO_PositioningAxis and
TO_SynchronousAxis. With these operating modes, the control and feedback interface of the
channels is a partial implementation of the PROFIdrive interface "Telegram 3". For a detailed
description of the use of motion control and its configuration, refer to the Motion The function "High-speed output (0.1 A)" enhances the signal clock of the digital outputs
(DQ0 to DQ7). Less delay, fluctuation, jitter, and shorter rise and fall times, occur at the
switching edges.
The function "High-speed output (0.1 A)" is suited for generating pulse signals in a more
precise clock, but provides a lower maximum load current.
For the PWM and frequency output modes, select the high-speed output of the channel in
STEP 7 (TIA Portal). You can also change the parameter assignment during runtime with the
help of the program via the data record.
High-speed pulse output (high-speed output) is available for the following operating modes:
● PWM
● Frequency output
● PTO (the pulse outputs for the PTO mode are always "High-speed output (0.1 A)")In the modes "Pulse width modulation PWM" and "Frequency output", you can set the pulse
output (DQA) of a pulse generator directly via the control program. Select the function for the
DQ direct control by deleting the output control bit of the PWM channel (TM_CTRL_DQ = 0)
in the control interface.
The direct control of the pulse output (DQA) can be helpful when commissioning a control
system for automation.
When you select the direct control of the pulse output (DQA) during a pulse output
sequence, the sequence continues to run in the background so that the output sequence is
continued as soon as the channel takes control again (by setting TM_CTRL_DQ = 1).
You assign the status of the pulse output (DQA) using the control bits SET_DQA.
When you set TM_CTRL_DQ = 1, you deselect the direct control of the pulse output (DQA)
and the channel takes over the processing. If the output sequence is still running
(STS_ENABLE still active), the PWM channel takes over the control of the output again. If
TM_CTRL_DQ = 1 and STS_ENABLE is not active, the module's channel also takes over
processing, but then outputs "0".
Note
Output signal TM_CTRL_DQ of the PWM channel
? If TM_CTRL_DQ = 1, the technology function takes over the control and generates pulse
sequences at the output PWM DQA.
? If TM_CTRL_DQ = 0, the user program takes over the control and the user can set the
PWM DQA directly using the control bits SET_DQAIn the modes "Pulse width modulation PWM" and "Frequency output", you can set the pulse
output (DQA) of a pulse generator directly via the control program. Select the function for the
DQ direct control by deleting the output control bit of the PWM channel (TM_CTRL_DQ = 0)
in the control interface.
The direct control of the pulse output (DQA) can be helpful when commissioning a control
system for automation.
When you select the direct control of the pulse output (DQA) during a pulse output
sequence, the sequence continues to run in the background so that the output sequence is
continued as soon as the channel takes control again (by setting TM_CTRL_DQ = 1).
You assign the status of the pulse output (DQA) using the control bits SET_DQA.
When you set TM_CTRL_DQ = 1, you deselect the direct control of the pulse output (DQA)
and the channel takes over the processing. If the output sequence is still running
(STS_ENABLE still active), the PWM channel takes over the control of the output again. If
TM_CTRL_DQ = 1 and STS_ENABLE is not active, the module's channel also takes over
processing, but then outputs "0".
Note
Output signal TM_CTRL_DQ of the PWM channel
? If TM_CTRL_DQ = 1, the technology function takes over the control and generates pulse
sequences at the output PWM DQA.
? If TM_CTRL_DQ = 0, the user program takes over the control and the user can set the
PWM DQA directly using the control bits SET_DQAUse this mode if you occasionally change the specific parameters (such as period
duration) before the start of the output sequence or during operation.
– The value in SLOT is the always applied when the value changes in LD_SLOT.
– The acknowledgment bit STS_LD_SLOT in the feedback interface is switched.
– The value of LD_SLOT defines the interpretation of SLOT (see the table below