Applicable Devices - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual
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Applicable devices
The following table lists the devices of the CPU module that can be set in the MODBUS devices.
Device name
Special relay
Special register
Input
Output
Internal relay
Latch relay
Annunciator
Edge relay
Link relay
Data register
Link register
Timer (contact)
Timer (coil)
Timer (current value)
Long timer (current value)
Retentive timer (contact)
Retentive timer (coil)
Retentive timer (current value)
Long retentive timer (current value)
Counter (contact)
Counter (coil)
Counter (current value)
Long counter (contact)
Long counter (coil)
Long counter (current value)
Link special relay
Link special register
*5
Step relay
Direct input
Direct output
Index register
Long index register
File register
Refresh data register
Buffer memory
*1 When setting a bit type device to the input register or output register, set it so that the number of assigned points will be a multiple of 16.
Otherwise, an error occurs in the engineering tool.
*2 The long counter (current value) and the long index register use two points of MODBUS devices.
*3 The assignment of the extended file register is fixed to the file register (ZR).
*4 The long timer (current value) and long retentive timer (current value) use four points of MODBUS devices. ( Page 113 Reading of
the long timer and long retentive timer)
*5 The step relay is read-only. An attempt of writing will cause an error.
*6 When the buffer memory is used, use H (hexadecimal constant) as the device symbol and set the address in hexadecimal notation. The
setting range is 1D5000H to 1D6FFFH. ( Page 369 User setting area for MODBUS/TCP function (Un\G1921024 to Un\G1929215))
1 FUNCTIONS
112
1.7 Communications Using MODBUS/TCP
MODBUS device (: Can be assigned, : Cannot be assigned)
Symbol
Coil
SM
SD
X
Y
M
L
F
V
B
D
W
TS
TC
TN
LTN
STS
STC
STN
LSTN
CS
CC
CN
LCS
LCC
LCN
SB
SW
S
DX
DY
Z
LZ
R
ZR
RD
*6
H
Input
Input register
*1
*1
*1
*1
*1
*1
*1
*1
*1
*1
*4
*1
*1
*4
*1
*1
*1
*1
*2
*1
*1
*1
*1
*2
Holding
Extended file
register
register
*1
*1
*1
*1
*1
*1
*1
*1
*1
*1
*4
*1
*1
*4
*1
*1
*1
*1
*2
*1
*1
*1
*1
*2
*3
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