Hi @marino-j,
Yes, there is a way to change this number. You have to set the environment variable CRYOSPARC_HEARTBEAT_SECONDS in the cryosparc2_master/config.sh file.
For example, append:
export CRYOSPARC_HEARTBEAT_SECONDS=180 to cryosparc2_master/config.sh, and restart cryoSPARC: cryosparcm restart