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7. Diagnostics
7. 5. Communication fault
Modbus communication faults are indicated by the red ERR LED on the Modbus card.
In the factory configuration, a communication fault will trigger a resettable [Com. network] (CnF) drive fault and initiate a freewheel stop.
It is possible to change the response of the drive in the event of a Modbus communication fault (see the Configuration section).
- [Com. network] (CnF) drive fault (freewheel stop, stop on ramp, fast stop or DC injection braking stop)
- No drive fault (stop, maintain, fallback)
The Parameters Manual contains a detailed description of how to manage communication faults (see the "Communication monitoring"
section).
• Following initialization (power-up), the drive checks that at least one command or reference parameter has been written for the first time
by Modbus.
• Then, if a communication fault occurs on Modbus, the drive will react according to the configuration (fault, maintain, fallback, etc.).
7. 6. Card fault
The [internal com. link] (ILF) fault appears when the following serious problems occur:
- Hardware fault on the Modbus card
- Dialog fault between the Modbus card and the drive
The response of the drive in the event of an [internal com. link] (ILF) fault cannot be configured, and the drive trips with a freewheel stop.
This fault cannot be reset.
Two diagnostic parameters can be used to obtain more detailed information about the origin of the [internal com. link] (ILF) fault:
- [Internal link fault 1] (ILF1) if the fault has occurred on option card no. 1 (installed directly on the drive)
- [Internal link fault 2] (ILF2) if the fault has occurred on option card no. 2 (installed on option card no. 1)
The Modbus card can be in position 1 or 2.
The [Internal link fault 1] (ILF1) and [Internal link fault 2] (ILF2) parameters can only be accessed on the graphic display terminal in
the [1.10 DIAGNOSTICS] (DGt-) menu, [MORE FAULT INFO] (AFI-) submenu.
Value Description of the values of the [Internal link fault 1] (ILF1) and [Internal link fault 2] (ILF2) parameters
0 No fault
1 Loss of internal communication with the drive
2 Hardware fault detected
3 Error in the EEPROM checksum
4 Faulty EEPROM
5 Faulty Flash memory
6 Faulty RAM memory
7 Faulty NVRAM memory
8 Faulty analog input
9 Faulty analog output
10 Faulty logic input
11 Faulty logic output
101 Unknown card
102 Exchange problem on the drive internal bus
103 Time out on the drive internal bus (500 ms)