10. Diagnostics messages of the operating system10.1 Transistor outputs (overload / short circuit)Operand Eventfunction block sequence is overloading the easy4's controller. Not all interrupt function blocks canbe run correctly.Additional diagnostic messages for the expansion devices can be assigned to dia-gnostic operands ID25 through ID96 based on the relevant device characteristics.Example Transistor outputsTransistor outputs in EASY-E4-DC-8TE1, EASY-E4-DC-16TE1 expansion devicesWhen there is a short circuit or overload at an output, the DIAG diagnostic messagecan be applied to a diagnostic operand. This means that when the event occurs, theoperands will assume a state of 1.Example Analog expansion deviceName ondeviceEventDIAG General diagnostic indicating that a diagnostic event is presentDIAG 1 Current input overloaded (current greater than 23 mA), excessive voltageDIAG 2 Analog output overloaded, excessive current, load too smallOpen wire at at least one current input (I < 4 mA)DIAG 3 The measuring range has been physically exceeded at an inputDIAG 4 The measuring range has been physically fallen below at an input, e.g., the current is < 4 mA for ameasuring range of 4–20 mA.10.1 Transistor outputs (overload / short circuit)The base and expansion devices' transistor outputs are thermally protected againstoverloads and short circuits. If the temperature inside the four transistor modules is toohigh, the outputs will be switched off. If the temperature returns to the operating rangeand the outputs are driven, the transistors will switch back on.The overload / short circuit fault scenario can be detected for the base device with oper-and ID14.ID14 = 1, errorExpansion devices feature a "DIAG" output that you can assign to operands ID25through ID96 for each device.ExampleEASY-E4-DC-8TE1 DIAG equals ID25EASY-E4-DC-16TE1 DIAG equals ID2610.2 Diagnostics bufferOnly possible with easySoft 7.518 easyE4 11/18 MN050009 EN www.eaton.com
