2.4 Communications with MP-series Controllers
Message Functions
2-73
For System Use (PARAM24)
This parameter is used by the system. It contains the channel number of the communications buffer that is
currently in use.
Reserved for System (PARAM25 to PARAM28)
This parameter is used by the system.
A user program must set PARAM24 to 0 on the first scan after startup. Thereafter, do not change the
value of PARAM24 from a user program or any other means. PARAM24 will be used by the system.
Do not change the values of PARAM25 to PARAM28 from a user program or any other means.
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