9 TROUBLESHOOTING
9.3 Acquiring diagnostic information of slave stations
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9
■Function block (FB) for diagnostic information acquisition (Slave station diagnostics)
Store the diagnostic information acquisition target station number in the diagnostic request information and turn on the
diagnostic information display request. Diagnostic information 1 and 2 is transferred when the request flag turns off.
• Labels to be defined (details on FB inputs and outputs)
• Module labels used in the program
• Program example
The following is a program example of MELSEC iQ-R series.
Label name Description
i_bEN A trigger (on input) for starting diagnostic information acquisition processing
i_wDiagnosisReq A value stored in the diagnostic request information. Enter the information acquisition target station number.
o_bENO A flag that indicates the acquisition processing is being performed. The on status indicates that the processing is being performed.
o_bOK A flag that indicates the acquisition processing has completed
o_wDiagnosis1Inf A start device for storing diagnostic information 1. Diagnostic information 1, for 15 words starting from the specified device, is stored.
o_wDiagnosis2Inf A start device for storing diagnostic information 2. Diagnostic information 2, for 16 words starting from the specified device, is stored.
Series Module label Description Device
MELSEC iQ-R RCPU.stB.bDiag_Request Diagnostic information display request Un\G1050.0
RCPU.stB.uInformation_Diag_Request Diagnostic request information Un\G1051
RCPU.stB.stDiag1.uNumber_Occupied_Stations Number of occupied stations (start device of
diagnostic information 1)
Un\G1053
RCPU.stB.stDiag2.uVal_ManufacturerCode Manufacturer code (start device of diagnostic
information 2)
Un\G1068
MELSEC iQ-F FX5CPU.stB.bDiag_Request Diagnostic information display request SD11126.0
FX5CPU.stB.uInformation_Diag_Request Diagnostic request information SD11127
FX5CPU.stB.stDiag1.uNumber_Occupied_Stations Number of occupied stations (start device of
diagnostic information 1)
SD11129
FX5CPU.stB.stDiag2.uVal_ManufacturerCode Manufacturer code (start device of diagnostic
information 2)
SD11144
(0) Check the on status of the diagnostic information display request and store the information acquisition target station number.
(57) Check the off status of the diagnostic information display request.
(75) Store diagnostic information 1 and diagnostic information 2.
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