Siemens SIMATIC ET 200SP Manual page 66

Modes and Functions
3.7 DC motor mode
Starting the output sequence
Your control program must issue the enable for the output sequence, using the software
enable (SW_ENABLE 0 → 1).
The STS_SW_ENABLE feedback bit indicates the software enable pending at the
TM Pulse 2x24V.
You can also assign the DIn.0 digital input of the TM Pulse 2x24V as a HW enable with the
"Function DI" parameter. The input delay (noise filter) of the hardware enable can be set
using the parameter "Input Delay".
If you want to use the hardware enable, it has to be combined with the software enable.
When SW_ENABLE has been enabled, the output sequence starts at the first positive edge
of the hardware enable. Further positive edges of the hardware enable during the current
output sequence are ignored by the TM Pulse 2x24V. The hardware enable option is not
supported for isochronous mode.
When the enable is issued (positive edge) and remains high for the input delay time, the
On-delay is started and the STS_ENABLE set. The PWM pulse train is output on expiration
of the On-delay. The output sequence runs continuously as long as SW_ENABLE is set.
Canceling the output sequence
● Using the SW_ENABLE signal: Disabling the software enable (SW_ENABLE = 1→0)
cancels the current output sequence and the last period duration is not completed.
STS_ENABLE and the DQn.A and DQn.B digital outputs are immediately set to 1 (motor
stop).
You must restart the output sequence to begin new pulse output.
● Using the digital input DIn.0:
– If "Function DI" is parameterized as "HW_ENABLE": a falling edge on DIn.0 will stop
– If "Function DI" is parameterized as "External stop": a rising edge on DIn.0 will stop
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the output sequence with the same behavior as using the SW_ENABLE.
the sequence with the same behavior as using the SW_ENABLE.
Technology module TM Pulse 2x24V (6ES7138‑6DB00‑0BB1)
Manual, 09/2015, A5E35061186-AA