Mitsubishi Electric MELSEC-Q Series User Manual page 74

(6) Parameter access timing
The parameter access timing is as follows.
Executed in the program
Executed by the master module
Parameter access request command for the slave module
(Y(n+1)0),
Parameter batch read command for the slave module
(Y(n+1)1),
Parameter batch write command for the slave module
(Y(n+1)2)
Parameter access completion flag (X(n+1)1)
Parameter access error (X(n+1)2)
Error flag clear command (Yn0)
No.
Turn on any of the signals below with a program to start parameter access.
1)
2) The operation in 1) turns off Parameter access completion flag (X(n+1)1).
When parameter access (read/write) is completed, Parameter access completion flag (X(n+1)1) automatically
3)
turns on.
If parameter access has an error, Parameter access error (X(n+1)2) turns on and Parameter access completion
4)
flag (X(n+1)1) automatically turns on.
5) Turning on Error flag clear command (Yn0) with a program turns off Parameter access error (X(n+1)2).
6) Use the program to turn off the signal that turned on in the step 1.
*1 Before the start of parameter access from the master module to the slave module, reflect the access method, access
target ID, and parameter data to the buffer memory.
*2 sError codes are stored in Latest error code storage area (Un\G10256) and the target IDs are stored in Latest error ID
storage area (Un\G10257). (The latest information is overwritten.)
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• Parameter access request command for the slave module (Y(n+1)0)
• Parameter batch read command for the slave module (Y(n+1)1)
• Parameter batch write command for the slave module (Y(n+1)2)
1)
ON
OFF
2)
ON
Parameter access in progress
OFF
ON
OFF
ON
OFF
Description
*2
6)
3)
4)
5)
*1