166 Optional I/O extension modulesIf warning A7AB Extension I/O configuration failure is shown,• make sure that the value of parameter 15.02 Detected extension module isCMOD-02.• set parameter 15.01 Extension module type to CMOD-02.You can now see the parameters of the extension module in parameter group 15 I/Oextension module. DiagnosticsFaults and warning messagesWarning A7AB Extension I/O configuration failure.LEDsThe extension module has one diagnostic LED. Technical dataDimension drawing:The dimensions are in millimeters and [inches].Installation: Into an option slot on the drive control unitDegree of protection: IP20Color DescriptionGreen The extension module is powered up.