Multiple Cpu Shared Device For Safety Observation Functions - Mitsubishi Electric MELSEC Q Series Programming Manual

4 DEDICATED DEVICES

4.3 Multiple CPU Shared Device for Safety Observation Functions

The device in this section is a device only for the monitor. Do not change the value of the device
by the user program. If the value is changed by mistake, safety cannot be secured.
The safety observation error also may occur, and the shut-off signal may be turned off.
PLC CPU and Motion CPU exchange information about the safety observation each
other by using the high-speed transmission area among multiple CPUs. Monitoring this
area by using the sampling trace function of GX Works2/GX Developer or digital
oscilloscope function of MT Developer2 can be a help to perform the troubleshooting.
CAUTION
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