6 217IF Module
6.6.2 MELSEC Communications
6-24
MELSEC Commands
The following table shows the MELSEC ACPU commands that are supported by the 217IF
Module, and the corresponding MEMOBUS command codes.
Table 6.9 MELSEC ACPU Commands
Command Description Qty 217IF
Support
*
MEMOBUS
Command
BR Reads bit devices in 1-point units 256 points
No −
WR Reads bit devices in 16-point units 32 words
(512 points)
Yes
01H/02H
Reads word devices in 1-point units 64 points
Yes
03H/04H
BW Writes bit devices in 1-point units 160 points
No −
WW Writes bit devices in 16-point units 10 words
(160 points)
Yes
0FH
Writes word devices in 1-point units 64 points
Yes
10H
BT Randomly specifies, sets, and resets bit devices and device
numbers in 1-point units
20 points
No −
WT Randomly specifies, sets, and resets bit devices and device
numbers in 16-point units
10 words
(160 points)
No −
Randomly specifies, sets, and resets word devices and device
numbers in 1-point units
10 points
No −
BM Sets the bit devices to be monitored in 1-point units 40 points
No −
WM Sets the bit devices to be monitored in 16-point units 20 words
(320 points)
No −
Sets the word devices to be monitored in 1-point units 20 points
No −
MB Monitors devices for which monitor data registration has
been performed (in bit units)
− No −
MN Monitors devices for which monitor data registration has
been performed (in word units)
− No −
ER Reads extension file registers in 1-point units 64 points
No −
EW Writes extension file registers in 1-point units 64 points
No −
ET Randomly specifies block numbers and device numbers, and
writes to the extension file registers in 1-point units
10 points
No −
EM Registers the extension file registers to be monitored in 1-
point units
20 points
No −
ME Monitors extension file registers for which monitor data reg-
istration has been performed
− No −
CR Reads the data in the buffer memory 64 words
No −
CW Writes the data in the buffer memory 64 words
No −
TR Reads the contents of the buffer memory of the special func-
tion unit
64 words
No −
TW Writes data to the buffer memory of the special function unit 64 words
No −
MR Reads the main sequence program 64 steps
No −
SR Reads the sub-sequence program 64 steps
No −
MW Writes the main sequence program 64 steps
No −
SW Writes the sub-sequence program 64 steps
No −
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