Set PWM state on bus error (index 0x80n:05 "Watchdog")

The setting in index 0x80n0:05 "Watchdog" fixes whether the output should assume a safe state in the event of a bus error. The following options are available (n = 8 for PWM1, n = 9 for PWM2):

Desired state
of the output in the event of a bus error

Default in 0x80n0:05 "Watchdog"

set to specified value

0: default watchdog value
The specified pulse width "PWM Output" of the output is set to the value defined in index 0x80n0:13 "Default output".
The period value "PWM Period" remains unchanged in the meantime.

set to specified value via ramp

1: Watchdog ramp
The specified pulse width "PWM Output" of the output is switched via the ramp defined in index 0x80n00:14 "Default output ramp" (linear change [digit/ms])
to the value specified in index 0x80n00:13 "Default output".
The period duration "PWM Period" remains unchanged in the meantime.

Retain current value

2: Last value
The output retains the current state.

Ramp

You can define the time to reach the default value when the watchdog behavior is set to the value 1 "Watchdog ramp".

 

Set PWM state on bus error (index 0x80n:05 "Watchdog") 1:

t: time in ms until the default value is reached.

ncurrent : the last output value that was received by the controller before the communication interruption.

ndefault : default value (CoE parameter 0x80n0:13).

vramp : ramp velocity in digits/ms (CoE parameter 0x80n0:14).