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10.1 Dedicated Instruction List and Available Devices
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DEDICATED INSTRUCTIONS
CHAPTER10 DEDICATED INSTRUCTIONS
The dedicated instructions make programming easy for use of the intelligent function
module functions.
10.1 Dedicated Instruction List and Available Devices
(1) Dedicated instruction list
The following are the dedicated instructions supported by the QJ71MB91.
(2) Available devices
The following devices are available for the dedicated instructions:
* 1 Word device bit designation can be used as bit data.
Word device bit designation is done by designating . .
(Designation of bit numbers is done in hexadecimal.)
For example, bit 10 of D0 is designated as .
However, there can be no bit designation for timers (T), retentive timers (ST) and counters (C).
Table10.1 Dedicated instruction list
Dedicated
instruction
Description Reference
MBRW
Reads or write MODBUS device data from or a slave.
Section 10.2
MBREQ
Communications with a slave in the request message format
containing any given protocol data unit.
Section 10.3
UINI
Changes the intelligent function module switch setting of the
QJ71MB91 (the mode, communication speed, transmission details,
and/or station No.)
Section 10.4
Table10.2 Available devices
Internal devices
File register Constant
Bit
*1
Word
X, Y, M, L, F, V, B T, ST, C, D, W R, ZR -
Word device Bit No.
D0.A
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