watchdog behavior on Mesa 5i24

More
6 years 8 months ago #156866 by dremeier
watchdog behavior on Mesa 5i24 was created by dremeier
Does the watchdog should bit when the 50pol connecter get off, or I unplug a sserial cable?
In my case it does not, that´s why i need your expertise, please.

How to configure the watchdog on the 5i24, correctly
When does the watchdog should bit?

here my HAL:
Code:
loadrt [KINS]KINEMATICS loadrt [EMCMOT]EMCMOT servo_period_nsec=[EMCMOT]SERVO_PERIOD num_joints=[KINS]JOINTS num_dio=20 num_aio=64 loadrt hostmot2 loadrt hm2_pci config=" num_encoders=4 num_pwmgens=1 num_stepgens=4 sserial_port_0=00000000" # smartserial ch0=7i90; ch1=7i87; ch3=TsHW (0=toggle 1=taster); ch5=stmbl setp hm2_5i24.0.watchdog.timeout_ns 5000000 loadrt pid names=pid.x,pid.y,pid.z,pid.s loadrt abs names=abs.spindle loadrt lowpass names=lowpass.spindle addf hm2_5i24.0.read servo-thread addf motion-command-handler servo-thread addf motion-controller servo-thread #addf pid.x.do-pid-calcs servo-thread #addf pid.y.do-pid-calcs servo-thread addf pid.z.do-pid-calcs servo-thread addf pid.s.do-pid-calcs servo-thread addf abs.spindle servo-thread addf lowpass.spindle servo-thread addf hm2_5i24.0.write servo-thread .......

Kind Regards
Andre

Please Log in to join the conversation.

More
6 years 8 months ago #156876 by PCW
Replied by PCW on topic watchdog behavior on Mesa 5i24
The hm2 watchdog is a time based watchdog and "bites" when LinuxCNC fails to write
the proper data to the card for a period exceeding its timeout value ( 5 ms in your HAL file example above )
This is used to force the I/O pins into a safe state if there is a fault in the Host processor
(a crash) or LinuxCNC software error.

Sserial devices have their own internal watchdogs and disable all outputs when they lose
communication with the controller.

If you wish to change LinuxCNCs operating state when a 50 pin connector is unconnected
you would need to use an input that is driven low by the daughtercard in normal operation
and sense this pin (when high it indicates a cable fault)

Similarly if you want to change LinuxCNCs operating state if you lose SSerial communications,
you would need to monitor the SSerial "run" state and take the appropriate action if it goes false.

Please Log in to join the conversation.

Time to create page: 0.076 seconds
Powered by Kunena Forum