Data Format; Precautions On Creating Data Using A Personal Computer - YASKAWA MP920 User Manual

7.7.3

Data Format

The following diagram shows the data format when the 10 words of data from holding regis-
ters 0 to 9 are read by the SFC09 Holding Register Read (Extended) command, which is one
of the Extended MEMOBUS commands.
MEMOBUS Command
8
000 Command Type
001 Identification No.
002 Destination channel
003 Source channel
004 Not used
005 Not used
006 Data length
007
008 Not used
009 Not used
00A Not used
00B Not used
00C Length
00D
00E MFC
00F SFC
010 CPU No.
011 Not used
012
Reference No.
013
014 Number of registers
015
7.7.4

Precautions on Creating Data Using a Personal Computer

Using Personal Computer as a Master
MEMOBUS Command Data
• Set the identification number each time communications are performed, using the fol-
lowing data order: 0 00 → 00 ff → 0 00.
• Specify 0 for the destination channel.
• Specify 0 for the source channel.
• When the remote station has more than one CPU, set the CPU number as follows:
Bit
Note: Destination CPU No.: Specify the CPU number of the Machine Controller.
7.7 Connection with Devices Manufactured by Other Companies
0
0× 11
0×00
0×00
0×00
0×00
218 header
0×16 (L)
0×00
0×00
0×00
0×00
0×00
(L)
0×08
0×00 (H)
0×20
Extended
0×09
MEMOBUS
0×00
packet
0×00
(L)
0×00
(H)
0×00
(L)
0×0A
(H)
0×00
7 4 3
Dest. CPU No. Source. CPU No.
Source CPU No.: Set to 0.
7-35
MEMOBUS Respones
8
0×19
000 Command Type
001 Identification No.
0×00
002 Destination channel
0×00
003 Sourece channel
0×00
004 Not used
0×00
005 Not used
0×28
006 Data length
0×00
007
0×00
008 Not used
0×00
009 Not used
0×00
00A Not used
0×00
00B
Not used
0×1A
00C Length
0×00
00D
0×20
00E MFC
0×09
00F SFC
0×00
010 CPU No.
0×00
011 Not used
0×0A
012
Number of references
0×00
013
014 Data (MW0)
015
016 Data (MW1)
017
026 Data (MW9)
027
0
0
(L)
(L)
(H)
(L)
(H)
(L)
(H)
(L)
(H)
7
(L)
(H)