Yaskawa NS300 - Manual (Page 16)

Subject: Technical Note Product: NS300/NS500 Doc#: eng.MCD.05.106
Title: NS300/500 Master Ladder Example
May 9, 2007 Page 16 of 16
Using MOD_R to load data with set/read commands
When using either the parameter read or parameter write set/read commands, output bytes 2-3 should not be
loaded with parameter data until the NS300/500 has acknowledged a set/read command is to be performed via
the MOD_R response bit. The MOD bit of the command message indicates a set/read command, and the
response is sent by the NS300/500 through MOD_R. This interlocking is shown for both output bytes 2-3 as well
as output bytes 4-7. Line 47 demonstrates this interlock for output bytes 2-3, and lines 55 and 56 show this for
parameter read/write commands, in addition to the set current position command.
Fig 13. MOD_R Interlocking for Output Bytes 2-3
Fig 14. MOD_R Interlocking for Output Bytes 4-7