Okuma P0700/P0850-P0870 alarm: NC start-up or MCS encoder alarms

Okuma OSP reports NC start error or encoder/MCS alarms. It is an alarm from the Encoder / measurement area, and in the catalog it is listed as “NC start-up or MCS encoder alarms”. On the machine you notice it like this: Alarm when starting, Encoder link or magnetic encoder, Axis/MCS does not initialise.

On the shop floor it almost always comes from one of these causes: Encoder/cable, MCS not initialised, Datos de encoder, Control/drive without communication. Rule out the most likely one on your machine first, before touching parameters or swapping anything.

Reset only after recovering initialization/encoder. Resetting without fixing the cause first only hides the problem: Okuma P0700/P0850-P0870 trips again and, in the meantime, you keep working with the machine in bad shape.

With the machine stopped and in a safe state, start with these checks: Write down exact P code, Do not move automatic, Check MCS/encoder diagnosis. That alone will tell you whether it is the program or whether you need to raise a maintenance job.

With Okuma P0700/P0850-P0870 active, avoid this: Do not bypass safety devices, Do not manipulate energized electrical cabinet, Do not continue producing if the alarm reappears. Skipping any of these points is what turns a minor stop into an expensive breakdown.

If it affects initialization or axis measurement. If you are not sure how far it goes, stop the machine and report it: a repeat alarm always works out cheaper than a crash.

It is critical: there is a real risk of damage to the machine, the tool or a person. Leave the machine stopped, do not keep resetting it to see if it goes away, and call maintenance before producing again. Guidance reference. Always confirm the full text in the exact machine/control manual.