Flowserve 3400IQ - Manual (Page 22)

Logix 3400IQ Digital Positioner FCD LGENIM3403-00 – 11/07
Controlling the Valve
The Logix 3400IQ digital positioner (or the valve position) can be controlled with one of three basic methods.
The first method is to control the valve directly from the Transducer block (FVPTB). When setting up and
configuring the positioner, this is a logical method to use. The second method in through the AO block. This
method will verify that the positioner is receiving a command from the AO block. This method can be used
when setting up the FF network or when troubleshooting the network. The final method is to put the
positioner in a FF network and receive its command signal from a function block in a device on the loop.
From the XD:
Control from the FVPTB is the easiest to set up. The FVPTB and AO must both be set to OOS. This can be
accomplished by two methods: The simplest method is to put the Resource block in OOS. (Whenever the
Resource block is in OOS mode, all other blocks will go to the same mode.)
NOTE: This could cause problems if the device has any function blocks being used in an FF network,
because all function blocks will go to OOS mode, and stop executing.
The second method is to have the FVPTB and AO OOS open their respective windows in the Configurator
and set MODE_BLK: TARGET to OOS.
Once the two block are set to OOS write, in percent of stroke, the new valve position in the FVPTB’s
FINAL_VALUE: VALUE parameter field and click the Write button. The positioner will move the valve to that
position.
From the AO: Control from the AO block is almost as simple. The AO must be set to MAN (manual) mode,
and the FVPTB must be in Auto. To get the any of the function blocks out of OOS the RB must be set to
Auto.
To get the AO block into MAN mode two parameters must be set. The CHANNEL parameter must be set to
1 and the SHED_OPTS parameter to anything but initialized.
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