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APP - 19
A
PPENDICES
(3) Available devices
The devices available in commands used in the MC protocol communication
function is shown below.
(a) PLC CPU area
Device code
Classification Device
ASCII code
(Note-1)
Binary code
Device number range (Default) Remarks
Special relay SM 91h 000000 to 002047 Decimal Internal system
device
Special register SD A9h 000000 to 002047 Decimal
Input X 9Ch 000000 to 001FFF Hexadecimal
Output Y 9Dh 000000 to 001FFF Hexadecimal
—
Internal relay M 90h 000000 to 008191 Decimal
Latch relay L 92h 000000 to 008191 Decimal
Annunciator F 93h 000000 to 002047 Decimal
Edge relay V 94h 000000 to 002047 Decimal
Link relay B A0h 000000 to 001FFF Hexadecimal
Data register D A8h 000000 to 012287 Decimal
Link register W B4h 000000 to 001FFF Hexadecimal
Contact TS C1h
Coil TC C0h
Timer
Current
value
TN C2h
000000 to 002047 Decimal
Contact SS C7h
Coil SC C6h
Retentive
timer
Current
value
SN C8h
000000 to 002047 Decimal
Contact CS C4h
Coil CC C3h
Counter
Current
value
CN C5h
000000 to 001023 Decimal
Link special relay SB A1h 000000 to 0007FF Hexadecimal
Link special register SW B5h 000000 to 0007FF Hexadecimal
Step relay S 98h 000000 to 008191 Decimal
• When the device number range is
changed, access is possible up to
the largest device number after the
change.
• Local devices cannot be accessed.
Direct input DX A2h 000000 to 000FFF Hexadecimal
Internal user
device
Direct Output DY A3h 000000 to 000FFF Hexadecimal
Devices of DX/DY1000 or later are not
available. Use X/Y devices to access
devices of DX/DY1000 or later.
Index register Index register Z CCh 000000 to 000019 Decimal
R Afh 000000 to 032767 Decimal
File register File register
ZR B0h 000000 to 3FD7FF Hexadecimal
—
Extended data
register
Extended data register D
A8h
• Binary:
000000 to 4184063
(4086k points maximum)
• ASCII:
000000 to 999999
(976.6k points maximum)
Decimal
If the number of points is set on the
PLC file tab of PLC parameter, access
is possible up to the largest device
number after the setting.
However, in the ASCII code
communication, the number of points
described on the left is the access
limit.
Extended link
register
Extended link register W
B4h
000000 to 3FD7FF
(4086k points maximum)
Hexadecimal
If the number of points is set on the
PLC file tab of PLC parameter, access
is possible up to the largest device
number after the setting.
(Note-1): When data is communicated in ASCII code, the second character " " can be designated a blank space (code: 20H).