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Is there an output choice similar to No_Fault?
Posted: Mon Aug 11, 2025 1:01 pm
by imacav8r
I have an issue with a slow brake, and rather than use the usual 'Axis _ Brake Release'
I would like it to release similar to the NO_FAULT output so it is released 'full session', as my motors are enabled full session.
I am already using the No_Fault output choice, and it appears that i cant use the same output choice on 2 different relay outputs to the real world.
Any ideas?
Re: Is there an output choice similar to No_Fault?
Posted: Mon Aug 11, 2025 1:51 pm
by suntravel
You can wire a SSR to the NO_FAULT output to control the brake, but as far as I can see in the PLC the brake is released all time if the servo is enabled.
Uwe
Re: Is there an output choice similar to No_Fault?
Posted: Mon Aug 11, 2025 1:55 pm
by imacav8r
suntravel wrote: ↑Mon Aug 11, 2025 1:51 pm
You can wire a SSR to the NO_FAULT output to control the brake, but as far as I can see in the PLC the brake is released all time if the servo is enabled.
I'm using the NO_FAULT output already, and do not want to parallel an SSR to this output.
The brake release only gets powered (releases) once you first move that axis. not at enable. I wish it did.
Uwe
Re: Is there an output choice similar to No_Fault?
Posted: Mon Aug 11, 2025 2:38 pm
by suntravel
Than edit the PLC to behave the brake release the same way like NoFaultOut...
Uwe
Re: Is there an output choice similar to No_Fault?
Posted: Mon Aug 11, 2025 3:21 pm
by cncsnw
Presumably you are using NoFaultOut to control an emergency stop relay or contactor.
Can you use another pole, or add an auxiliary contact, to control the servo brake through that same relay or contactor?
Failing that, go with Uwe's first suggesting, and just wire another relay from your existing NoFaultOut output (with its coil in parallel with the coil of your first emergency stop relay/contactor).
Re: Is there an output choice similar to No_Fault?
Posted: Mon Aug 11, 2025 3:48 pm
by suntravel
An other possible solution, depending on the servo driver, is to use its Brake Output to control the brake with an SSR.
On the A6 Servos this output is switched depending on the S-On input, and additional controlled with a timer and min rpm parameters.
But if going this way, you cannot use CNC12 diagnostic to see if the brake is on or off.
Uwe