Breakaway And Transit Times; Diagnosis Messages And Alarms - Pepperl+Fuchs FD0-VC-Ex4.FF Manual

"PRIMARY_VALUE_D"
The parameter "PRIMARY_VALUE_D" gives the value which is fed back as valve position to the assigned
function block. "PRIMARY_VALUE_D" is an unsigned 8 with the status which is displayed in the function
block as READBACK_D.
Which information is issued at which range of values in "PRIMARY_VALUE_D" depends on the parameter-
isation of "Sensor usage" and "PV_D generation" (section 6.5.4).
"Valve Information"
This parameter displays information of the current status of the valve and/or transducer block. The following
information is given:
• Stroke counter limit exceeded
• Cyclic functional test running
• Actuation - The valve has not yet reached the new final position after having changed the reference
value.
6.6.3

Breakaway and transit times

With the "Time Monitoring" activated, the breakaway and transit times are measured during each opening
and closing process of the valve and displayed in the parameters shown below. These values are not stored
in the device, i. e. after a power loss these values will not be available until after the valve has been opened
and closed once.
If during time measuring is recognised that a valve blocks, the time measured just at that moment is set to
the value 9999 s.
• "Breakaway time closed -> open"
• "Transit time closed -> open"
• "Breakaway time open -> closed"
• "Transit time open -> closed"
6.7

Diagnosis messages and alarms

The valve coupler FD0-VC-Ex4.FF is provided with several diagnostic options which are given in section
6.4.
If a fault occurs, the transducer block sets a block alarm. The block alarm is a combined error signal for all
fault signals and remains set as long as a fault in the block exists. To receive detailed information of the
alarm cause after a block alarm, the valve coupler provides the following parameters:
• BLOCK_ERR
• XD_ERROR
• Valve Lead Fault
• Sensor Lead Fault
• Valve Warnings
• Valve Error
• Valve Information
In section 7.3 a detailed list is given for the messages of these parameters and hints for fault elimination.
Subject to reasonable modifications due to technical advances.
Pepperl+Fuchs Group • Tel.: Germany +49 621 776-0 • USA +1 330 4253555 • Singapore +65 67799091 • Internet http://www.pepperl-fuchs.com
Fieldbus Valve Coupler FD0-VC-Ex4.FF
Parameterisation and operation of the valve coupler
Copyright Pepperl+Fuchs, Printed in Germany
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