Chapter10 Dedicated Instructions; Dedicated Instruction List And Available Devices - Mitsubishi QJ71MB91 User Manual

10
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
MBRW
MBREQ
UINI
(2) Available devices
Internal devices
*1
Bit
X, Y, M, L, F, V, B
10
- 1 10.1 Dedicated Instruction List and Available Devices
The following are the dedicated instructions supported by the QJ71MB91.
Dedicated
instruction
Reads or write MODBUS
Communications with a slave in the request message format
containing any given protocol data unit.
Changes the intelligent function module switch setting of the
QJ71MB91 (the mode, communication speed, transmission details,
and/or station No.)
The following devices are available for the dedicated instructions:
Table10.2 Available devices
Word
T, ST, C, D, W
* 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
Description
device data from or a slave.
File register
R, ZR
.
D0.A
Constant
-
. .
Word device Bit No.
Reference
Section 10.2
Section 10.3
Section 10.4