Siemens SIMATIC ET 200SP Manual page 104

Configuring
5.4 TIA portal Device configuration
Substitute values
If you select the "DQ substitute a value" option as a reaction to CPU STOP, then you must
configure the substitute value (0 or 1) for the DQn.A and DQn.B outputs.
Each channel has two outputs (A and B). A resistive or inductive load is wired to a channel's
A output, so you must assign a substitute value to the DQn.A output. A reversible direction
DC motor load is wired to a channel's A and B outputs, so you must assign substitute values
to the DQn.A and DQn.B outputs.
You cannot set both substitute values of one channel to the high state (DQn.A and DQn.B).
If you do so, an error code is returned to the parameterization attempt. See the Parameter
validation errors (Page 120) topic for details.
Startup
To start a new output sequence after CPU/master STOP with STS_SW_ENABLE set, first
reset SW_ENABLE. Keep SW_ENABLE reset until STS_SW_ENABLE is also reset.
If the "Continue working mode" option is used, then during a change from CPU-/Master-
STOP to RUN (startup), the CPU/Master cannot clear the outputs.
Possible solution: In the part of your program that is executed during startup, set the
"Software enable" (SW_ENABLE = 1) control bit.
Modified parameter assignment
The status assumed by the TM Pulse 2x24V at CPU/master STOP remains even in the case
of parameter assignment or configuration of the ET 200SP station. This occurs, for example,
at POWER ON of the CPU/master, or the IM 155-6, or at the resumption of DP transfer.
In "Continue working mode", however, and after loading changed parameters or
configuration of the ET 200SP station to the CPU/master, the TM Pulse 2x24V terminates
the process. As a result, the TM Pulse 2x24V does the following:
● Resets the DQ digital output.
● Resets STS_ENABLE
● Terminates the current output sequence.
104
Technology module TM Pulse 2x24V (6ES7138‑6DB00‑0BB1)
Manual, 09/2015, A5E35061186-AA