Yaskawa 1000 Series Drive Option - Profibus-DP Technical Manual - Manual (Page 27)

7 Option Data and I/O Maps
YASKAWA ELECTRIC SIEP C730600 42B 1000-Series Option SI-P3 Technical Manual 27
„ Flowchart
Figure 13 illustrates the handshaking function when using a MEMOBUS/Modbus message.
Figure 13
Figure 13 MEMOBUS/Modbus Message Flowchart
START
Clears the handshaking
register HS bit to "0"
Sends a new message
Creates a command message.
Sends to slave
Toggles handshaking
register HS bit <1>
INDATA HS =
Handles the response
START
Clears handshaking
register HS bit to "0".
Receives for the master
Command message
Command executed
Creates a response message
Sends to master
Command not executed
Creates a response
Initialization
Abnormal
NO
YES
Normal
YES
NO
PROFIBUS-DP Master SI-P3 Card
<1> “Toggle” means changing
the HS bit status from
0 to 1 or from 1 to 0.
Power ON or
re-initialization
Toggles handshaking
register HS bit <1>