K1 is a 110 V AC contactor on a saw, its coil is switched by a solid-state relay, the SSR is driven from output pair 0 of a 1791ES-IB8XOBV4, and every 600 ms the contactor makes a small tick you can hear from the door of the panel. The scope on O0+ shows why: the … Read more
K1 and K2 are 100S-C09 safety contactors in series on a 4 kW conveyor motor, the CROUT that drives them holds Fault Code 16#5003 – both feedbacks ON with the outputs off – through every press of the reset button, and the suggestion at 06:10 was to raise the Feedback Reaction Time from 100 ms … Read more
Count the safety functions before you pick the box. Where a 440R relay wins, where a 440C-CR30 takes over, and what a safety network adds to the job.
F059 Safety Open means both PowerFlex 525 safety inputs are unpowered. Read S1, S2 and S+, tell F059 from F111, and know when the jumper must come out.
The 440R safety relay on the new guard, a 440R-S12R2, was showing PWR/Fault flashing red four times, IN steady red with the door shut, and the electrician had already swapped it for the spare, which did the same thing within a second of power-up. The guard switch is a single-contact tongue switch, and the link … Read more
The E-stop is reset, the safety relay is closed, every one of the twelve PowerFlex 525s on the accumulation line has S1 and S2 at 24 V again and F059 cleared from its display, and nothing moves. No fault on any drive, no alarm on the HMI, twelve zones with a carton on every eye … Read more
Siemens PLC Programming Drive Motor Regarding the previous article (Siemens Tia Portal). [irp posts=”3465″ name=”Siemens TIA (Totally Integrated Automation) Portal”] Let’s take an example and show step by step. In order to drive a DC Motor 30 seconds by a button (START and STOP), the following ladder diagram can be used. We choose the first … Read more