LED Indicators
The device is equipped with LEDs for quick status checking and diagnostics:
LEDs on a front panel of the iSMA-B-MAC36NL controller
- The power LED (ON) lights up (green), and then turns the power supply on.
- The communication LED (COM1) lights up (orange) for 20 ms in the transmit state for sending each package through the main RS485 port. As long as the device sends packages, the communication LED blinks continuously.
- The communication LED (COM2) lights up (orange) for 20 ms in the transmit state for sending each package through the extension RS485 port. As long as the device sends packages, the communication LED blinks continuously.
- The communication LEDs (ETH1 and ETH2) light up (orange) in the transmit or receive state when sending/receiving each package through the particular Ethernet port. As long as the device sends/receives packages, the communication LEDs blink continuously.
- The universal inputs LEDs (U1-U16) indicate the statuses of the universal inputs. If the LED is on, the resistance value connected to the input is lower than the switching threshold value (dry contact input is active).
Note: The LED also lights up if the voltage connected to the input has a very low potential.
- The digital inputs LEDs (I1-I4) indicate the statuses of the digital inputs. If the LED is on, the input is active (resistance value connected to the input is lower than the switching threshold value).
- The analog outputs LEDs (A1-A8) indicate the statuses of the analog outputs. If the LED is on, the output voltage or PWM factor is different than 0.
- The digital outputs LEDs (O1-O8) indicate the statuses of the digital outputs. If the LED is on, the output is active (closed circuit).
- The status LED (RUN) does not light if the power is connected. After the operating system (Linux) has started up, the RUN LED lights up continuously (green). Next, after the Platform has started up, the RUN LED also flashes very quickly. If a station exists in the controller, after the station has been started up and it operates correctly, the RUN LED flashes slowly (1Hz).
- The alarm LED (ALM) lights up in red color if there is no SD card inserted, or there is a problem with the SD card connection/reading/writing.