Siemens SIMATIC ET 200SP Manual page 48

Modes and Functions
3.5 On/Off-delay 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.
● When the DIn.0 digital input goes high (positive edge) and remains high for the input
delay time, the On-delay is started. After the On-delay expires, the DQn.A digital output is
set.
● When the DIn.0 digital input goes low for the input delay time, the Off-delay is started.
After the Off-delay expires, the DQn.A digital output is cleared.
● If the TM Pulse 2x24V recognizes a pulse duration or inter-pulse duration at the DIn.0
digital input shorter than the input delay time, then the input is ignored and the DQn.A
digital output is unchanged.
● If the TM Pulse 2x24V recognizes a pulse duration or inter-pulse duration at the DIn.0
digital input longer than the input delay time, but too short to produce the parameterized
pulse duration or inter-pulse duration, then the ERR_PULSE bit is set and the DQn.A
digital output is unchanged.
● At the next edge of the DIn.0 digital input, the TM Pulse 2x24V clears the ERR_PULSE
feedback bit
Note
TM_CTRL_DQ technology module output control signal
• If TM_CTRL_DQ = 1, then the TM Pulse 2x24V module has control and produces pulse
sequences at the DQn.A output.
• If TM_CTRL_DQ = 0, then the CPU has control and your program can set DQn.A/DQn.B
outputs directly with the SET_DQA/SET_DQB control bits.
Canceling the output sequence
Disabling the software enable (SW_ENABLE = 1 → 0) during the On-delay or pulse cancels
the current output sequence and the last period duration is not completed. STS_ENABLE
and the DQn.A digital output are immediately reset to 0.
You must restart the output sequence to begin new pulse output.
48
Technology module TM Pulse 2x24V (6ES7138‑6DB00‑0BB1)
Manual, 09/2015, A5E35061186-AA