Mitsubishi Electric 600M Series Error SYW0004: RIO3 communication error

CNC milling machine · taken from the manufacturer’s manual, pages cited

Error codeSYW0004

An emergency stop input signal was received from a remote I/O unit (RIO3). Or, the communication cable with the remote I/O unit (RIO3) is not connected properly. The manual's first action is: “Examine the causes of the remote I/O unit emergency stop, and remove them.”

Model
Mitsubishi Electric 600M Series
Display shows
RIO3 communication error (SYW0004)
Type
Error code
Source
Manual p. 496

What SYW0004 means

RIO3 communication error p. 496

Common causes

  • An emergency stop input signal was received from a remote I/O unit (RIO3). Or, the communication cable with the remote I/O unit (RIO3) is not connected properly. p. 496

What to do

  1. Examine the causes of the remote I/O unit emergency stop, and remove them. p. 496
  2. Check the cable connection. p. 496

Before you service the product, read the safety instructions in the manual p. 4.

If SYW0004 is still not resolved

  • contact service / dealer p. 5
    “Do not change the fixed cycle program without prior consent from the machine manufacturer.”
  • contact service / dealer p. 5
    “Do not turn OFF the NC a”
Open the manual at page 496 All 600M Series error codes Manual details & download

This page summarises what the manufacturer’s manual says about SYW0004; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Mitsubishi Electric. Found a mistake? Report an error.