Operation - Siemens SIPART PS2 Operating Instructions Manual

Functions/operations using PROFIBUS PA
9.2 Acyclic data transfer
9.2.2.15

Operation

Open the 'Device > Operation' menu. An online dialog is opened with two tabs. Go to the
'Operation' tab.
Target mode
The following target modes (operating modes of function blocks) are possible:
● Automatic (AUT)
● Manual (MAN)
● Out of service (O/S)
Note that the target modes refer to the operating modes of function blocks of the PROFIBUS PA
block model, and should not be confused with the "Automatic" and "Manual" operating modes
of the positioner.
The above target modes are effective when the positioner is in automatic mode (AUT). If the
positioner is in manual mode (MAN), they are only effective after an on-site switchover to
automatic mode (AUT).
These target modes are saved in the positioner in the power failure-safe manner.
Automatic mode
As long as the positioner is not integrated into the cyclic service as a slave, SIMATIC PDM can
be used to send a setpoint to it in a cyclic manner.
Make the following settings:
1. Go to the "Operating mode" tab.
2. Set the target mode to "Automatic".
3. Enter a value between 0 and 100% for the desired setpoint, quality as "Good" and the status
as "OK".
4. Transfer these settings to the positioner.
The positioner is controlled using the desired setpoint until a cyclic master starts
communication with a slave or you switch over the positioner to the "Manual" mode on-site.
Note
Note that the positioner responds with the "Poor" quality and the "Constant value" status after
sending the data.
If you exit this target mode and no other master sends a setpoint to the positioner, it is controlled
using the configured fail-safe value after the set monitoring time expires.
Manual mode
You can use SIMATIC PDM to send a setpoint to the positioner even when cyclic
communication is active. To do this, you need only set priority over the cyclic master
beforehand.
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SIPART PS2 with PROFIBUS PA
Operating Instructions, 05/2019, A5E00127926-AC