MSG - Message command for screen and remote alerts
The MSG command adds messages to a G-code program. Messages can appear on the MASSO screen in the toolpath area, or be sent to myWorkshop on PC and the myWorkshop mobile app. Use them for operator instructions, training aids or reminders during a job.
Syntax and destinations
Write the command, a space, then the message text. MSG with no text clears the message currently shown.
General form: MSG_[destination] <space> <message>. The destination can be any combination of S and W, in any order. Everything after the space is the message.
How messages are displayed
- Messages are limited to a single line of 34 characters. Anything longer is cut off after 34 characters.
- A message stays on screen until it is cleared, overwritten by another message, or replaced by a system message.
- To clear a message, press OK on the message display or issue MSG with no text.
Examples
Display a message on screen
N10 MSG Load Material
Shows "Load Material" on the MASSO screen.

Clear a message with G-code
N10 MSG Load Material N20 G04 P3000 N30 MSG
Shows "Load Material", pauses for 3 seconds, then removes the message.
Message before a tool change (with M00 or M01)
Combine MSG with M00 or M01 to stop the machine so the operator can read the message before continuing.
N10 MSG Change tool to V-Bit {90 deg 0.5"}
N20 M01
N30 T3 M06- The message is shown and M01 pauses the machine until Cycle Start is pressed.
- You do not need to press OK: the system tool change message overwrites it.
- If Optional Stop (Ctrl + O) is off, the machine does not stop and the message may be replaced straight away.
- Your post processor can insert messages like this automatically.

Multiple timed messages
N10 MSG READ DIAL FOR BACKLASH MEASUREMENT N20 G04 P3000 N30 MSG ENTER THIS VALUE INTO MASSO BACKLASH N40 G04 P3000 N50 MSG TEST COMPLETE
Each instruction stays on screen for 3 seconds (G04 dwell) before the next one replaces it.
Send messages to myWorkshop
N10 MSG_SW Load Material . . . N9980 MSG_W Job Complete N9990 M30
- "Load Material" appears on both the MASSO screen and myWorkshop.
- "Job Complete" goes to myWorkshop on PC and the mobile app only, which is useful as a job-finished notification.
Video: backlash test sequence
This clip shows MSG used to guide the operator through each step of a backlash test.