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{| class="wikitable" border="1" cellspacing="0"
|+ '''Most often emergency barcodes'''
! Barcode content 
! Action
! Description
|- 
| PLCIL[<OpID>]
| '''Invalid Label'''
| This bar code is used when it is not possible to scan a bar code to fulfill a part check operation (standard part check, rack part check (pick-to-light), camera inspection) and/or a serial number evidence and/or Poka-Yoke check). An optional part [<OpID>] can specify an operation, for which the control bar code should be used. If omitted, the first available operation is used. An "available operation" means an operation of a type part check or serial or Poka-Yoke, which is requested and not yet fulfilled. If there is no such operation, an error message "Invalid ID" is evoked.
|-
| PLCABC<OpID>
PLCABCALL
| '''Accept Bad Count'''
| PLC client will accept a bad count of OK results of an operation. It is used when it is not possible to reach OK fulfilling of an operation (for example tightening).
|}

{| class="wikitable" border="1" cellspacing="0"
|+ '''All barcodes'''
! Barcode content 
! Action
! Description
|- 
| PLC	
| Responsible confirmation
|
|- 
| PLCEOP	
| End Of Program	
| End of PLC client. A system prompt will appear when the client is finished. So then it is possible to log in on a console. On Fedora 14, the Client program will be automatically restarted.
|- 
| PLCHALT	
| PC switch off	
|
|- 
| PLCREBOOT	
| PC reboot	
| PLC station will be restarted, not client only, but the whole station.
|- 
| PLCSCANSW	
| Scanner switch	
|
|- 
| PLCHUP	
| New configuration	
| After the scanning of this barcode, the configuration of PLC client will be reloaded from the configuration file (/usr/local/plc/etc/plc_client_XY.cfg). If the current product is not finished, the configuration is not reloaded immediately, but after the product is finished.
|- 
| PLCHUPNOW
| Load a new configuration immediately
|
|- 
| PLCHUPP<ProductID>		
| Load a new configuration after a product <ProductID> will have been finished
|
|- 
| PLCOFFLINE	
| Offline mode	
|
|- 
| PLCEXEC<command>	
| System command execution	
|
|- 
| PLCD<debug level>	
| Debug level	
| Sets the debug to the specified level. The standard level is 0. The higher level, the more information is stored into the log file.
|- 
| PLCLOGCOM	
| Serial port traffic log on	
|
|- 
| PLCDLOGCOM	
| Serial port traffic log off	
|
|- 
| PLCMSG[:<time_in_seconds>]:\<text\>	
| Screen message	
|
|- 
| PLCSN	
| Normal sound level	
|
|- 
| PLCSL	
| Low sound level	
|
|- 
| PLCPRINTLLABEL	
| Last label reprint	
|
|- 
| PLCPRINTOCCURR	
| Output protocol of a current product reprint	
|
|- 
| PLCPRINTOC<ProductID>	
| Output protocol of a product reprint	
|
|- 
| PLCKBDI	
| Keyboard input	
|
|- 
| PLCROS	
| Reset Of Sequence	
| Request for the sequence reset is sent to PLC kernel. If the product ID is scanned after this bar code, the sequence pointer will be set to that product. It is not possible to reset a sequence backwards.
|- 
| PLCREWORK	
| Local rework mode	
|
|- 
| PLCSENDREW	
| Send to rework station	
|
|- 
| PLCRMREW	
| Rework mode cancelled	
|
|- 
| PLCFINREW	
| Rework mode finished	
|
|- 
| PLCIL[<OpID>]
| Invalid Label
| This bar code is used when it is not possible to scan a bar code to fulfill a part check operation (standard part check, rack part check (pick-to-light), camera inspection) and/or a serial number evidence and/or Poka-Yoke check). An optional part [<OpID>] can specify an operation, for which the control bar code should be used. If omitted, the first available operation is used. An "available operation" means an operation of a type part check or serial or Poka-Yoke, which is requested and not yet fulfilled. If there is no such operation, an error message "Invalid ID" is evoked.
|-
| PLCABC(ALL|NEXT|<OperationID>)	
| Accept Bad Count	
| PLC client will accept a bad count of OK results of an operation. It is used when it is not possible to reach OK fulfilling of an operation (for example tightening).
|- 
| PLCDBTM	
| Disable Blockinf og Tightening Machine	
|
|- 
| PLCEBTM	
| Enable Blockinf og Tightening Machine	
|
|- 
| PLCUBNCTM	
| UnBlock Tightening machine blocked because of an incomplete product	
|
|-
| PLCUBTM	
| UnBlock Tightening machine	
|
|- 
| PLCREVTM[Channel]	
| Reverse run activation	
|
|- 
| PLCDREVTM[Channel]	
| Reverse run deactivation	
|
|- 
| PLCTMJOB	
| Manual tightening machine job or Pset selection	
|
|- 
| PLCUBCO	
| UnBlock Conveyor	
|
|- 
| PLCADSN	
| Accept Duplicated Serial Number	
|
|- 
| PLCANOV	
| Accept Nok Verification	
|
|- 
| PLCATOR<Operation ID>	
| Accept Tolerance OverRun	
|
|- 
| PLCABP	
| Accept Bad Pallet	
|
|- 
| PLCDM<model No.>	
| Default model	
|
|- 
| PLCROO<Operation ID>	
| Reset Of Operation	
|
|- 
| PLCROP	
| Reset Of Product	
|
|- 
| PLCTOOL	
| Tool selection	
|
|- 
| PLCGRPC	
| Tightening group change	
|
|- 
| PLCCABLE	
| Forced Poka-Yoke check	
|
|- 
| PLCERASE	
| Product erase	
|
|- 
| PLCLABELREPRINT	
| Label reprint	Using a print script. 
| Product ID needs to be scanned after this barcode.
|- 
| PLCRCRES	
| Reset of serial device	
|
|- 
| PLCNEXT	
| Next product in the sequence	
| Simulates a scanning of the next product ID in the sequence. It is not possible to use this bar code after the "Sequence error" situation. Only the correct product ID can be scanned then.
|- 
| PLCLOGNOTE	
| Log note	
| Note from a keyboard will be stored into a log file
|- 
| PLCIOTEST	
| Test of I/O device(s)	
|
|- 
| PLCSCO	
| Set Conveyor Destination	
|
|- 
| PLCCLSE	
| Clear Last Sequence Errors	
|
|- 
| PLCPROBLEM	
| Log problem and make a screenshot
|
|}