Yaskawa JAPMC-MC2303-E - Manual (Page 112)

6
Message Send and Receive Functions
6.2 Message Receive Function
6.2.5 Parameter Details for MSG-RCV Function
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( 8 ) PARAM12 and PARAM13: Write Range
„ When Pro-Typ=1 (MEMOBUS)
This parameter sets the range of addresses that can be written for a write requested from the sending station. Any write
request that exceeds this address range will result in an error.
The write ranges in PARAM12 and PARAM13 are set as word addresses.
ΠThe MP900/MP2000 Series Machine Controllers store all data for write requested from the sending station to M reg-
isters.
The write range parameter can be used to set a range of M registers that can be written using messages.
The write range parameters are listed in the following table.
Set the write ranges so that the following conditions are satisfied.
0 ≤ Write range LO ≤ Write range HI ≤ Maximum value of M addresses
Example: The following settings would be used to permit writing to the M registers with addresses 1000 to 1999.
PARAM12=1000
PARAM13=1999
With these settings, the receiving station will output an error and not perform the write if a write request is
received for any registers not between MW01000 and MW01999.
„
When Pro-Typ=2 (Non-procedure Protocol)
This parameter sets the offset value and the upper limit of addresses that can be written for a write request from the
sending station. Any write request that exceeds this address range will result in an error.
( 9 ) PARAM14: Reserved by the System (2)
PARAM14 is used by the system. (The current transmission buffer channel number is held here.)
ΠMake sure that the user program sets this parameter to 0 in the first scan after the power is turned ON. Thereafter,
do not change the value set for this parameter because the system will use it.
( 10 ) PARAM15 and PARAM16: Reserved by the System (3)
These parameters are used by the system. Do not change the values set for these parameters.
Parameter Contents Description
PARAM12 Write range LO Leading address of the write range
PARAM13 Write range HI Final address of the write range
Parameter Contents Description
PARAM12 Holding register offset Leading address of the write range
PARAM13 Write range HI Final address of the write range