Delta AS Series Operation Manual page 254

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5.1 Introduction of Devices
This section describes the values and strings processed by the PLC. It also describes the functions of devices
that include input, output, and auxiliary relays, as well as timers, counters, and data registers. The PLC
simulates external devices in the PLC's internal memory, so the word "device" is a generic name that refers to
all the internal memory locations in the PLC. A device can be a bit device or a word device. Bit devices
simulate coils, contacts and flags, while word devices simulate registers.
5.1.1 Device Table
Type
Bit device
Word device
Constant* 1
Device name
Input relay
Output relay
Data register
Auxiliary relay
Special auxiliary relay
Relay
Timer
Counter
32-bit counter
Input relay
Output relay
Data register
Special auxiliary relay
File register
Timer
Counter
32-bit counter
Index register
Decimal system
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Number of devices
X 1024
Y 1024
D 48,0000
W 48,0000
M 8192
SM 4096
S 2048
T 512
C 512
HC 256
X 64
Y 64
D 30000
W 30000
SR 2048
FR 65536
T 512
C 512
HC 256（512 words）
10
E
5
16 bits: -32768 to 32767
K
32 bits: -2147483648 to 2147483647
Range
X0.0–X63.15
Y0.0–Y63.15
D0.0–D29999.15
W0.0–W29999.15 * 4
M0–M8191
SM0–SM4095
S0–S2047
T0–T511
C0–C511
HC0–HC255
X0–X63
Y0–Y63
D0–D29999
W0–W29999 * 4
SR0–SR2047
FR0–FR65535
T0–T511
C0–C511
HC0–HC255
E0–E9
E10–E14 * 4