Burkert 8681 - Signal Priorities; When Several Statuses Overlap for One Valve; When Position Feedback Overlaps

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LED Colour Assignments
21.3 Signal priorities
21.3.1 When several statuses overlap for one valve
For the classic variants (24VDC,120VAC,AS-i,DeviceNet)and the “Device-specic display mode
8681 Classic X” of the IO-Link and büS/CANopen variants, the the following priority list applies:
1. Internal error
2. Manual operating mode is active, e.g. by magnetic manual override - see chapter “22 Service Mode /
Manualoverride”onpage151
3. Other faults,e.g.positionmeasuringsystem(WMS)nottaught,WMSsignalerror,buserrororother
(seechapter“21.2.2Feedbackincaseoferrors/warnings”onpage144)
4. Service / maintenance request
For the other display modes of IO-Link and büS/CANopen design:
(seechapter“21.1”onpage136)thedisplaylogicisdescribedindetailintherespectivesubchapters:
•“NAMUR”–seechapter“21.1.2”onpage139
•
“Valvemode”–seechapter“21.1.3”onpage140
•
“Valvemode+errors”–seechapter“21.1.4”onpage141
•
“Valvemode+errors+warnings”–seechapter“21.1.5”onpage142
21.3.2 When position feedback overlaps
The following logic is the factory setting for all display modes which report the position:
S1 S2 S3 S4 Error Priority Note / ashing patterns
active active active active S4
FlashinginS4ashingpattern(ifS4activatedby
DIP*))asS3/S4haspriorityoverS1andS2
active active S4 FlashinginS4ashingpatternifS4activatedbyDIP*)
active active active S3
FlashinginS3ashingpatternasS3/S4haspriority
over S1 and S2
active active S2 Position feedback of S2 has priority
Table 17: Display priorities when position feedback overlaps (factory settings = „PRIO 24“)
*) The activation of S4 via DIP switches is possible only with the classical designs and with the büS/
CANopen design.
TheIO-LinkdesignhasnoDIPswitches,S4(externalinitiatorsignal)canbeactivated/deactivatedonly
viaconguration/parametrisation.
Factory settings: S4hasthehighestpriority,descendingtoS1(i.e.S4-S3-S2-S1)-thiscorrespondsto
the“PRIO24”inthefollowing“Table18”.
If the factory setting described above in
“Table17”(=“PRIO24”)istobechanged,thiscanbedonefor
IO-Link and büS/CANopen designsviasoftwareusingthesensorparameter“PRIO(priorityfeedback
positions)”(0x2C05/0x8).
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Control Head Type 8681