ePCLogic400 cpu leds signals : special cases
In addition to conditions descripted in the reference hw manual, some leds of the ePClogic400 could give special case indications.Led 2 (green)
Led 3 (red)
Red leds (all together)
| Meaning | PLC program diagnostics |
| Indication | On steady: application program exists, has been loaded, andis running.Off: Error, application program not running. |
| Special case | Fast blinking : application program stopped on break point 1 blink and pause 10 sec (starting from version 4.6.0) : PLC startup is suspended; waiting the password insertion to run the gsetup manager 2 blinks and pause 10 sec (starting from version 4.6.0) : PLC startup is suspended; gsetup manager is running |
| Meaning | Local bus error |
| Indication | On steady: communication errors on local bus.Off: normal operation. |
| Special cases | Fast blinking at startup : hw configuration found and reading in progress 1 blink and pause: local bus stopped by SW watchdog event 2 blinks and pause : local bus stopped by plc stop command or by application program command 3 blinks and pause: local bus startup failed (hw failure or no card inserted in the local bus) |
| Meaning | – |
| Indication | – |
| Special cases | Blinking with period 1 sec (and green led off) : PLC startup is failed; errors occurs during OS or fw startup (files *.out *.spt not found on the disk, module loading errors etc.)NB : this special case is managed by the OS released starting from version 4.6.0; then it’s possible also on PLC having older fw versions, if the hardware has been changed with a new one or updated with newer OS |