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5. Explanation of Devices
5.1 Devices and Device Numbers
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5. Explanation of Devices
5.1 Devices and Device Numbers
The devices are address symbols to identify signals handled in PLC. The device numbers are serial
numbers assigned to the devices. The device numbers of devices X, Y, B, W, and H are represented
in hexadecimal notation. The device numbers of other devices are represented in decimal notation.
5.2 Device List
Device Device range Units Details
X* X0 to XAFF 2816 points 1-bit Input signals to the PLC. Machine input, etc.
Y* Y0 to YE7F 3712 points 1-bit Output signals from the PLC. Machine output, etc.
M M0 to M8191 8192 points 1-bit For temporary memory
L L0 to L255 256 points 1-bit Latch relay (Backup memory)
F F0 to F127 128 points 1-bit For temporary memory. Alarm message interface
SB SB0 to SB1FF 512 points 1-bit Special relay for links
B B0 to B1FFF 8192 points 1-bit Link relay
SM* SM0 to SM127 128 points 1-bit Special relay
V V0 to V255 256 points 1-bit Edge relay
SW SW0 to SW1FF 512 points 16-bit Special register for links
SD SD0 to SD127 128 points 16-bit Special register
T0 to T15 16 points 1-bit/16-bit 10ms unit timer
T16 to T95 80 points 1-bit/16-bit 100ms unit timer
T96 to T103 8 points 1-bit/16-bit 100ms incremented timer
T104 to T143 40 points 1-bit/16-bit 10ms unit timer (Fixed timers)
T144 to T239 96 points 1-bit/16-bit 100ms unit timer (Fixed timers)
T240 to T255 16 points 1-bit/16-bit 100ms incremented timer (Fixed timers)
T0000 to T0255 256 points 1-bit T1: Timer coil
T1000 to T1255 256 points 1-bit T0: Timer contact
T2000 to T2255 256 points 16-bit TS: Timer setting value
T
T3000 to T3255 256 points 16-bit TA: Timer current value
C0 to C23 24 points 1-bit/16-bit Counter
C24 to C127 104 points 1-bit/16-bit Counter (Fixed counters)
C0000 to C0127 128 points 1-bit C1: Counter coil
C1000 to C1127 128 points 1-bit C0: Counter contact
C2000 to C2127 128 points 16-bit CS: Counter setting value
C
C3000 to C3127 128 points 16-bit CA: Counter current value
D D0 to D8191 (Note3) 8192 points 16-bit/32-bit Data register
R* R0 to R8191 8192 points 16-bit/32-bit File register. CNC word I/F
W W0 to W1FFF 8192 points 16-bit/32-bit Link register
Z Z0 to Z13 14 points 16-bit Address index
N N0 to N7 Master control's nesting level
P*
P0 to P255
P360 to P379
Conditional jump, subroutine call label
K-32768 to K32767 Decimal constant for 16-bit command
K
K-2147483647 to
K2147483647
Decimal constant for 32-bit command
H0 to HFFFF Hexadecimal constant for 16-bit command
H
H0 to HFFFFFFFF Hexadecimal constant for 32-bit command
(Note 1) The applications of the devices having a * in the device column are separately determined.
Do not use the undefined device Nos., even if they are open.
(Note 2) The fixed timer and fixed counter cannot be changed with the numerical setting. Note that
those can be changed with the numerical setting when D or R device is specified.
(Note 3) The range of D0 to D8191 devices can be used on the software version D0 and higher.