Overcome Obstruction; Reversing (Retraction Attempt) - Siemens SIDOOR ATD4 W Series System Manual

SIDOOR functions
4.3 Extended functions
4.3.8.2

Overcome obstruction

The overcome obstruction system can be used to overcome a blocking obstruction by repeated
pushing. The system remains active as long as the initial drive order is not actively changed.
Example
1. The drive order "close" is present.
2. The system closes.
3. An obstruction is detected before reaching the "Closed" end stop.
4. The second of four retries is made.
5. The "Close" drive order is overwritten by any other drive order.
6. The retry system is immediately exited.
7. The system responds according to the new drive order.
Parameter assignment
The number of retries to overcome the obstruction can be set in parameter p3860 or p3877. If
the number is set to "0", the overcome obstruction system is disabled in the corresponding
direction.
A variable waiting time can be configured before each retry (p3861 or p3878).
The type of drive control during this wait time can be "stop" or "deenergize" (p3862 or p3879).
After the configured number of retries have been made, wait mode is activated (see the
following section "Wait mode"). A following drive order can also be configured, which is
activated at the same time as the switch to wait mode (p3863 or p3880).
While the retry system is active, any external change to a drive order (see Table A-16 DCMD signal
(Page 319)) immediately ends all open retry actions (including the cancelation of wait mode).
4.3.8.3

Reversing (Retraction attempt)

When an obstruction is detected, the obstruction reversing system can be used to initiate an
immediate full or partial reverse - a retraction attempt. This system is simply termed "reverse".
The system remains active as long as the initial drive order is not actively changed. You can find
an example of this in section Overcome obstruction (Page 88).
Parameter assignment
The number of reversals (retraction attempts) can be defined in parameters p3864 and p3881.
If the number is set to "0", the obstruction reversing system is disabled in the corresponding
direction.
NOTICE
As of V1.14 the counting of the reverses has to be changed. The number of drives in
reverse direction is counted. Value 1 means that the door only drives once in reverse
direction to the end position. The reverse procedure is completed after that.
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ATD4xxW for industrial applications
System Manual, 06/2022, A5E51901827B AA