Yaskawa MP940 - Manual (Page 111)

MP940 Functions
4.2.8 General-purpose Serial Definitions
4-18
When the Serial Definition Window is opened for the first time without any settings having previously
been made, a new message box will be displayed. Click the OK Button and then proceed to the next
operation.
4.2.8 General-purpose Serial Definitions
There are definition tabs for two circuits in the General-purpose Serial Settings Window.
Use both these tabs when making definitions.
„ Serial Communications Definitions
The following table shows the contents of the serial communications definitions.
„ Transmission Protocol
• MEMOBUS: Yaskawa standard MEMOBUS protocol
• MELSEC: Special protocol (control protocol format 1) for Mitsubishi Electric general
sequencer controller
• No protocol: Any data received at any time according to user application program.
INFO
Item Contents
Circuit No. Select by CIR# in Tab Window.
Transmission Protocol Select MEMOBUS, MELSEC, or no protocol.
Master/Slave Select Master or Slave operation.
Device Address Set 0 for the Master, or 1 to 63 for Slaves.
Serial Interface Select RS-232C, RS-485, or RS-422.
Transmission Mode Select RTU, ASCII, or none.
Data Length 8 bits or 7 bits
Parity Bit Even, odd, or none
Stop Bits 1 or 2
Baud Rate Select the baud rate (unit: bps).
Transmission Delay Set the delay time for the send/receive function (MSG-SND/RCV)
until a message is sent.
Automatic Reception Specify whether there will be an automatic response to requests
from the master.
Reading Input Relays Set the leading number and range for input relays read for automatic
responses.
Reading Input
Registers Set the leading number and range for input registers read for auto-
matic responses.
Reading/Writing Coils Set the leading number and range for coils read and written for
automatic responses.
Reading/Writing
Holding Registers Set the leading number and range for holding registers read and
written for automatic responses.
Coil/Holding Register
Write Range Set the write range for coils and holding registers read and written
for automatic responses.