WAGO 750-652 Manual

Also see for 750-468: Manual

Contents

WAGO-I/O-SYSTEM 750 Diagnostics 59750-652 Serial Interface RS-232 / RS-485ManualVersion 1.4.09 Diagnostics9.1 Serial Operating ModesTable 43: Diagnostics, Serial Operating ModesDiagnostics Event SolutionInput buffer full The I/O module receivesdata via the serial interfacefaster than accepted by theapplication.• Make sure that the applicationalways accepts dataimmediately• Reduce data traffic• Use flow control• Reduce baud rateOutput bufferfullThe I/O module receivesdata faster from theapplication than it sends viathe serial interface.• Check continuous send• Reduce data traffic• Increase baud rate• Make sure that the oppositeside accepts dataParity error Data transmission wasinterrupted.• Check the configuration of theinterface parameters• Use a shielded cable• Change wire routing• Shorten cable• Eliminate interferenceOverflow Data loss has occurred. • Reduce baud rate9.2 Data Exchange Operating ModeTable 44: Diagnostics, Data ExchangeDiagnostics Event SolutionWrong length The I/O modules havedifferent process imagesizes• Configure the same processimage sizeChecksum error Data transmission wasinterrupted. The last validvalue is retained in theprocess image.• Use a shielded cable• Change wire routing• Shorten cable• Eliminate interferenceTimeout The data transmission isinterrupted or has beeninterrupted for a longerperiod of time (seechecksum error). Theprocess image (input) hasbeen overwritten with thevalue 0.• Check cable and clampingpoints for uniformity• Check the configuration of theI/O modules• for checksum error: SeeDiagnostics “Checksum error”