51
Fieldbus Valve Coupler FD0-VC-Ex4.FF
Function blocks DO and DI
Subject to reasonable modifications due to technical advances.
Copyright Fuchs, Printed in Germany
Fuchs Group • Tel.: G49 621 776-0 • USA +1 330 4253555 • Sin65 67799091 • Internet http://www.pepperl-fuchs.com
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IO_OPTS
W
S
OOS
Options which allow the user to adapt the block algorithm to the task of the
block. Possible options:
Invert
OUT_D is calculated to: SP_D is inverted
Faultstate restart
After a device reset SP_D is set to the value of
FSTATE_VAL_D.
Faultstate type
If fault state type is set, SP_D is set to FSTATE_VAL_D
in case of fault, otherwise the last value is kept.
SP-PV Track LO
In case of fault SP_D is always set to the value of
PV_D. Thus the current position of the valve is kept and
not the last reference value.
Target to Man
In case of fault the target mode is modified to "Man"
and the safe status is kept in this way.
SP-PV Track Man
If the target mode is "Man", SP_D is always set to the
value of PV_D.
PV for BKCal_Out
As the value of BKCAL_OUT_D, PV_D is always used
instead of SP_D in order to be able to use PV_D in a
function block application.
STATUS_OPTS W
S
OOS
Option which allows the user to adapt processing of the status by the block to
the task of the block. The option is:
Propagate Fail Bkwd If this option is set, the function block does not signal by
an own alarm if the status of PV_D becomes "bad" but
transfers the status incl. substatus via BKCAL_OUT_D.
READBACK_D
This parameter gives the current valve position which is fed back by the trans-
ducer block.
CAS_IN_D
Via this parameter, the reference value is specified by another function block
or a control system in the "Cas" mode.
CHANNEL
W
S
OOS
The channel number of a transducer block is entered in this parameter in
order to connect the function block with this transducer block. Valid values are
1 ... 4.
FSTATE_TIME
W
S
Time in seconds between the detection of a missing specified reference value
and setting the safety value.
FSTATE_VAL_D W
S
This value is used as safety value if the I/O option Faultstate type is set.
BKCAL_OUT_D W
Feedback of the current valve position to a superior function block or a control
system. The value of BKCAL_OUT_D is determined by the option PV for
BKCal_Out.
RCAS_IN_D
W
Via this parameter, the reference value is specified by another function block
or a control system in the "RCas".
SHED_OPT
W
S
Defines the behaviour of the block in "RCas" mode on detection of a missing
specified reference value.
RCAS_OUT_D
W
Feedback of the current reference value to a control system.
UPDATE_EVT
This parameter is used to signal to the control system that a parameter
marked by "S" was overwritten if the control system supports alarm mes-
sages.
BLOCK_ALM
This parameter is used to signal diagnosis messages which are displayed in
BLOCK_ERR to the control system, if the control system supports alarm mes-
sages.
Parameter
Char.
Description
