Yaskawa MP2300S Basic Module - Manual (Page 253)

6.2 Communication with Other MP Series
6.2.4 When the MP2300S Acts as Master (ladder program which uses a MSG-SND function)
6-64
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Parameter list setting example for message receive function
A parameter list setting example is as follows when receiving messages from a transmit source using the connec-
tion with a connection number = 3:
Note: IN: Input, OUT: Output, SYS: For system use
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Example of Using the Message Receive Function in a Ladder Program
A ladder program for receiving messages in the remote equipment (MP2300) side is similar to that in ( 2 ) How to
Set up the Remote Device (MP2300) to Be Connected of 6.2.3 When the MP2300S Acts as Master (I/O message
communication function is used).
However, change Communication buffer channel number and Connection number respectively based on the I/O
definition and parameter list settings.
( 3 ) How to Start Communication
1.
MP2300 side starts to receive the messages.
As the sample ladder program starts the message receive operation just after the system startup, you don ’ t need to
operate it particularly. Normally, accept the default.
2. Turn Execute ON for the message transmit function in the MP2300S side to transmit messages.
The sample ladder program is created to transmit a message every one second when five seconds elapsed after
the low-speed scan (or high-speed scan) startup.
The way to change the message transmission interval is similar to that in ( 3 ) How to Start Communications of
6.2.1 When the MP2300S Acts as Slave (automatic receive function is used).
Table 6.15 Parameter List Setting Example1 (parameter list start address Param = DA00000)
Register
Number
Setting
Value
Parameter
Number
IN/OUT Remarks
DW00000 – PARAM00 OUT Process result
DW00001 – PARAM01 OUT Status
DW00002 00003 PARAM02 IN Connection number = 3 (For receiving read operation)
DW00003 – PARAM03 OUT Option
DW00004 – PARAM04 OUT Function code
DW00005 – PARAM05 OUT Data address
DW00006 – PARAM06 OUT Data size
DW00007 – PARAM07 OUT Remote CPU number
DW00008 00000 PARAM08 IN Coil offset = 0 word
DW00009 00000 PARAM09 IN Input relay offset = 0 word
DW00010 00000 PARAM10 IN Input register offset = 0 word
DW00011 00000 PARAM11 IN Holding register offset = 0 word
DW00012 00000 PARAM12 IN Writable address lower limit = MW00000
DW00013 65534 PARAM13 IN Writable address upper limit = MW65534
DW00014 – PARAM14 SYS Reserved by the system. (Zero clear at startup)
DW00015 – PARAM15 SYS Reserved by the system.
DW00016 – PARAM16 SYS Reserved by the system.