Siemens ET 200SP Manual page 128

The following figure shows an example of an output sequence for direct control of DQn.A:
Figure 4-14 Example of an output sequence for direct control of DQn.A (Pulse output mode)
Note
If you set the SET_DQA and SET_DQB control bits simultaneously, the ERR_DQB bit is set
in the feedback interface and only the digital output DQn.A is set.
The ERR_DQB bit is reset once you have acknowledged the error by setting RES_ERROR.
Technology Module TM Pulse 2x24V (6ES7138‑6DB00‑0BB1)
Manual, 05/2019, A5E35061186-AB
Configuring/address space
4.8 Direct control of digital outputs
127