11.2.2.15 Write Lock - Siemens SIPART PS2 PA 6DR55 Series Operating Instructions Manual

Functions/operations using PROFIBUS PA
11.2 Acyclic data transfer
If you remove a positioner from the PROFIBUS path, you must reset its address to 126 using
this function, so that you can re-integrate a positioner in this or another system depending on
the requirement.
The address cannot be reset if a cyclic master is already communicating with the positioner.
Reset message
You can use the "Reset message" tab to reset the messages regarding the checkback,
device status and unfiltered device diagnostics 1 in the PDM. Since it concerns an online
menu, messages that have been reset in the PDM may be set again in the next cycle as the
corresponding events still exist in the device.

11.2.2.15 Write lock

Use
After completing the commissioning, you can set the write lock to prevent undesired changes
through an acyclic master.
You can however change the parameters of the positioner on-site as before.
Activate the write lock
1. Call the "Write lock" sub-menu.
2. Enter "ON" in the "Write lock" sub-menu in the positioner.
If you still try to write, the PDM displays the "Connection terminated" message.
Note
If "Hardware protection" equal to "ON" is displayed in this mask, the binary input 1 in the
positioner has been parameterized at "bLoc1" or "bLoc2" and activated. Writing through the
PDM is this blocked.
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SIPART PS2 with PROFIBUS communication
Operating Instructions, 09/2007, A5E00127926-07