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Support Device

MELSEC-Q series

* You can scroll this table sideways.

device symbol Comment
X (Input relay)  
Y (Output relay) An accessible range of the device depends on the setting of PLC.
DX (Direct input)
DY (Direct output)
M (Internal relay)
L (Ratch relay)
S (Step relay)
SM (Special relay)
B (Link relay)
F (Annunciator)
V (Edge relay)
TC (Timer coil)
TS (Timer contact)
SC (Totalizing timer coil)
SS (Totalizing timer contact)
CC (Counter coil)
CS (Counter contact)
SB (Link special relay)
D (Data register)
SD (Special register)  
W (Link register)  
TN (Current timer value)  
SN (Current totalizing timer value)  
CN (Current counter value)  
R (File register)  
ER (Extended file register)  
ZR (Extende file register(serial nos.)  
SW (Link special register)  
Z (Index register) Only accessible Ethernet unit
BM (Random access buffer)  
G (Buffer memory)  
WR (Recieving register) Only accessible CC-Link board
WW (Sending register) Only accessible CC-Link board
D (Extended data register)  
W (Extended link register)  
* An accessible range of the device depends on the setting of PLC.

MELSEC-QnA/A/FX seriers

* You can scroll this table sideways.

Device symbols Comment
X (Input relay)  
Y (Output relay)  
M (Internal relay)  
SM (Special rerlay) Special relay(after M9000) is accessed as SM0-.
B (Link relay)  
F (Annunciator)  
TC (Timer coil)  
TS (Timer contact)  
SC (Totalizing timer coil)  
SS (Totalizing timer contact)  
CC (Counter coil)  
CS (Counter contact)  
D (Data register)  
SD (Special register) Special relay(after D9000) is accessed as SD0-.
W (Link register)  
TN (Current timer value)  
SN (Current totalizing timer value)  
CN (Current counter value)  
R (File register)  
ER (Extended file register)  
Z (Index register)  
BM (Random access buffer) Only Ethernet unit

* An accessible range of the device depends on the setting of PLC.