Commissioning
7.7 Device replacement
SITRANS VP300 with or without HART
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Operating Instructions, 03/2011, A5E01258666-03
Result
Manual commissioning of the positioner is complete. The initialization settings are saved.
The positioner fulfils its control tasks with the factory settings. After the initialization the
positioner will function with the new settings.
7.7
Device replacement
Introduction
Note
Initialization
Using the "Device replacement" parameter, replacement of the positioner is possible without
having to interrupt ongoing processes. However, manual input of the initialization parameters
only allows an approximate adjustment of the positioner to your actuator. Following
initialization, the positioner initially works with the manually defined parameter values.
For this reason, an automatic or manual initialization should be carried out as soon as
possible.
NOTICE
Deferred initialization
Initialize the new positioner as soon as possible. The following properties can be ensured
only after initializing:
Optimum adjustment of the positioner to the mechanical and dynamic properties of the
actuator.
Non-deviating position of endstops
Correctness of the maintenance data
There are two ways of replacing a positioner when the equipment is in operation, without
having to interrupt the process. The two options depend on whether your positioner has
HARTcommunication.
First possibility - with HART communication
1.
Read the initialization parameters from the current device. Use the parameterization tools
suitable for this purpose.
2.
Fix the actuator at its current position mechanically or pneumatically. Use the locking
function of your mounting kit, if available.
3.
Dismount the current device from the actuator.
4.
Mount the new device to the actuator.