You are logging data in to grafana at 100 Hz from a Plc? That’s pretty quick for a plc, I’d definitely have either a tiny program or a fast periodic task to be

You are logging data in to grafana at 100 Hz from a Plc? That’s pretty quick for a plc, I’d definitely have either a tiny program or a fast periodic task to be generating new samples every 10 ms, although I’m sure there are faster PLCs out there than m340