The Mitsubishi E04 ' DEVICE NOT READY ' error message typically indicates the CNC parameters do not match the Calmotion parameters. Match the baud rate, flow control and RS232 port settings on Calmotion to the Mitsubishi.
• Check communication parameters (see Mitsubishi users manual)
• Cable incorrectly configured or not connected. Make sure that the included Calmotion cables and connectors are being used.