Mitsubishi QJ71MB91 User Manual page 59

4
MODBUS(R) STANDARD FUNCTIONS
Function
Sub-function
code
code
(Sub code)
16 - Write multiple registers
17 - Report slave ID
20(6) - Read file record
21(6) - Write file record
22 - Mask write register
Read/Write multiple
23 -
registers
*1
- Read FIFO queue
24
Read device
*1
-
43
identification
Remark
Table 4.1 MODBUS standard function support list (continued)
Function
Writes values to multiple holding
registers.
Acquires the information of the slave
(QJ71MB91) mounted station into the
master.
Reads values of one or more extended
file registers.
Writes values to one or more extended
file registers.
Masks the values stored in a single
holding register with AND or OR and
writes the value.
Reads from or writes to multiple holding
registers.
Reads values from the holding
registers in FIFO queue structure.
Reads the module identification
information of the slave.
* 1 The slave function of the QJ71MB91 does not support this function.
( This section (2))
The usable functions are limited when the QJ71MB91 is installed to a
MELSECNET/H remote I/O station.(
4.1 MODBUS(R) Standard Function Support List
Accessible
Description devices per
message
123 points
124 points
122 points
1 point
Read:
125 points
Write:
121 points
This section (3))
Broadcast Reference
1 to Section
4.15
Section
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4.16
1 to Section
4.17
1 to Section
4.18
Section
4.19
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Section
4.20
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