Yaskawa MP920 Communications Module - Manual (Page 213)

8 Example Communications Module Applications
8.3.5 MSG-SND Function
8-22
8.3.5 MSG-SND Function
The following diagram shows a MELSEC Master MSG-SND ladder logic program for the
217IF Module of the MP920.
Send start
DB000200
Normal
completion
DB000211 Abnormal
completion
DB000212
Command
DB000201
DB000210
Executing
Transmission busy
monitioring timer Stop
command
DB000202
Command
DB000201
003.00 DW00031 T
Command
DB000201 Executing
DB000210
Normal
completion
DB000211
Abnormal
completion
DB000212
MSG-SND
EXECUTE
ABORT
DEV-TYP
BUSY
COMPLETE
ERROR
PRO-TYP
CIR-NO
CH-NO
PARAM
DA00000
00005
00001
00002
00001
Stop
DB000202
DB000211
Normal
completion
Abnornal completion
Normal counter
DB000212
IFON
IEND
DEND
INC DW00024
DW00000 DW00026
DW00027 DW00001
SB000003
IFON
00000
00064
00001
00000
DW00005
DW00006
DW00007
DW00008
DW00009
DW00010
DW00011
DW00012
DW00024
IEND
00000
00000
00000
00000
One scan at startup
Stop command
DB000202
Normal
completion
DB000211 Abnormal
completion
DB000212
00001 DW00002
At startup, set the parameters in the first scan.
Remote station number setting
Connection code setting (readout)
Data address setting (address 0)
Data size setting (64 words)
Remote CPU No. setting
Coil offset setting
Input relay offset setting
Input register offset setting
Holding register offset setting
System register clear
Normal pulse counter clear
Force stop if still not completed 3 seconds
after the Send command is issued.
Stop counter added when the Stop
command is issued.
The executing coil turns ON when the CPU
receives the command.
The normal completion or abnormal completion
coil turns ON at processing completion.
Use PRO-TYP 1 (MEMOBUS communications).
CIR-NO (circuit number) 2 (depending on the connection port)
CH-NO (channel number) 1 (fixed at 1 with the 217IF Module)
Turns ON at receive completion of a query message and at
send completion of a response message.
Send started at 1-second intervals.
Function Send instruction
Normal pulse counter added
Ended by a transmission error
Error pulse counter added
Processing result stored
Status stored
Sends a message to a remote station.
Error counter clear
Low-speed scan (DWG L): SB000003
High-speed scan (DWG H): SB000001
00003
Stop command
DB000202 Stop counter
DB00021B
INC DW00023
Send start
DB000200 Send cycle timer
Transmission start
DB000200
001.00 DW00030 T
The circuit number
changes according to the
system configuration.
INC Error counter
DW00025
DW00004
DW00025
DB000202
Set the station number set for MELSEC by
the station number setting switch. →
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