Device Description - Pepperl+Fuchs FD0-VC-Ex4.FF Manual

4.2.1

Device description

The valve coupler is accommodated in a housing for panel mounting. This housing may also be mounted
at a pipeline using specific accessories. The device has been designed for the ignition protection class "in-
trinsic safety" and can be arranged in the field subject to the approval. The connector terminals of the field-
bus are spatially and galvanically separated from those of the auxiliary valves and PFCs. LEDs on top of
the terminal blocks indicate the instantaneous status of the valve coupler locally.
• PWR (power): green (continuous light) = Supply voltage available
• COM/ERR:
• IN/OUT CHK:
For the wiring and evaluation of the final position feedbacks the 2:1 procedure is used which is described
in more detail in section 4.2.4.
Monitoring and diagnosis features are integrated in the field device. The valve coupler can record automati-
cally the lead breakages or short-circuits, carry out position dependent functional tests (cyclic function test,
section 6.5.7) and count the setting operations of the valve.
Commissioning is done in two steps. In the first step a "configuration wizard" aids during commissioning.
After demanding the type of drive used (self-opening or self-closing) the kind of final position feedback con-
tacts (PFCs) and, if time monitoring is activated, the reference values of breakaway and transit times of the
valves are taught in automatically by an initialisation run. Commissioning can also be done independently
from the configuration wizard by direct parameterisation.
After this first step the monitoring and diagnosis features mentioned above can be activated optionally in a
second step.
A prerequisite to control up to four valves are four independent function blocks (DO type) and transducer
blocks, which are itemized in the engineering tool and which must be parameterised individually as descri-
bed above.
The valve coupler corresponds to the profile identification type number 111 and communication profile 31
according to Fieldbus Foundation specification.
Figure 4.1shows the internal structure of the valve coupler and also the galvanic separation can be seen
there.
4x4
Figure 4.1: Mimic diagram of valve coupler FD0-VC-Ex4.FF
Subject to reasonable modifications due to technical advances.
12
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red (continuous light)
red (flashing)
red (continuous light)
red (flashing)
Valve control +
final position feedback
Status indicators
Simulation,
Micro processor
write prot.
Fieldbus Valve Coupler FD0-VC-Ex4.FF
= Hardware fault
= no bus activity or bus fault
= Fault code for a hardware fault detected during acceleration.
= Channel fault; for the cause of the fault refer to section 7.
DC-DC Converter
function separation
MAU
Opto coupler
Bus attachment
function separation
Product description
-
S
FDE
+
Power
limiter
PA
Copyright Pepperl+Fuchs, Printed in Germany