Appendix G MSG-SND/MSG-RCV Functions (Ethernet)
G.2 Message Receive Function (MSG-RCV)
A-113
( 7 ) Write Range HI (PARAM13)
Sets an available address range for the write request from the transmission side. A write request which is out of this
available address range will cause an error.
Specify the write range (PARAM13) as a word address.
Note: The write range parameter enables you to specify the range of the M register which permits writing mes-
sages.
Specify the write range so that the expression below is met:
0 ≤ Write range HI ≤ Maximum address of M register
Example: When setting the last address of the M register which permits writing to 1999:
PARAM13=1999
The reception side will return an error against a write request to an address other than MW00000 to
MW01999, and will not write it.
( 8 ) Reserved by System 1 (PARAM14)
Used by system (the channel number of the communication buffer in use is stored).
Note: At the first scan during power up, make sure to set this to “0” by user program.
After that, the register is used by system, so do not change the value with the user program.
( 9 ) Reserved by System 2 (PARAM15, PARAM16)
Used by system. Do not change the value with the user program, etc.
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