Mitsubishi MELSEC-A series, Programming Manual

Page: 300 / 508

7. APPLICATION INSTRUCTIONS
7
−
98
MELSEC-A
Functions RFRP
(1) Stores data of "n3" points from the address specified at "n2" of buffer memory in
the special function module specified at "n1" (the I/O number in the remote I/O
station assigned by the master station) in the link registers starting with the one
specified at (D) of the master station.
(2) The link registers (W ) to be specified at (D) should be specified in the range of
parameter assignment from the remote I/O station to the master station.
For parameter setting, refer to POINT below.
(3) Y(n1+E) is ON during execution of the RFRP instruction. X(n1+1E) turns ON at
completion of the execution. Since Y(n1+E) remains ON after completion of the
RFRP instruction execution, turn it OFF by the sequence program.
(4) When the RFRP instruction cannot be executed due to error of specified special
function module, X(n1+1D) turns ON. If this is the case, check the specified
special function module. If Y(n1+D) is turned ON, X(n1+1D) turns OFF.
POINT
Provide interlock using X(n1+1E), X(n1+1F), Y(n1+E), and Y(n1+F) so that
other RFRP/RTOP instructions may not be executed during data read from
remote I/O stations by the RFRP instruction.
Execution Conditions
Operation Errors In the following cases, operation error occurs and the error flag turns on.
•
The specified station is not a remote station.
•
The head I/O number specified at "n1" is not a special function module.
•
The number of points, n3, exceeds the link register range (W0 to 3FF).
Read
command Y(n1+E) Y(n1+F)
H K K
RFRP 0140 10 W052 10
X(n1+1E) X(n1+1F)
Read command
Executed only once
RFRP
OFF
ON