Mitsubishi Electric MELSEC Q Series Programming Manual page 101

3 START-UP PROCEDURES
(3) User program size
The following size is necessary for the sequence programs for safety observation.
Secure the following area by the user program as an empty area.
• Only safety signal comparison use: 17kbyte (approx. 4300 steps)
• Both safety signal comparison and speed monitoring
• Both safety signal comparison and safety communication function
• Safety signal comparison, speed monitoring, and safety communication function
If the sequence programs for safety observation cannot be written because the
program size is insufficient, "Safety observation error (error code: 21)" will occur.
: 27kbyte (approx. 7000 steps)
: 39kbyte (approx. 10000 steps)
: 50kbyte (approx. 13000 steps)
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