Siemens LOGO! CIM - Page 10

Application and functions
1.2 Universal Data Model
LOGO! CIM
10 Operating Manual, 10/2021, A5E51250518-AA
I, Q, M, V constructed a data model to simulate the process image in PLC.
Naming rule for the UDM address: address type + short data type + start address. No byte
alignment, for example, VW3 means the word consist of Byte 3 and Byte 4 in area V.
The UDM address is case insensitive.
Data type
(Short data
type)
Length Value range I
（512
Bytes）
Q
（512
Bytes）
M
（512
Bytes）
V
(W: 896 Bytes
R: 1024 Bytes)
bool (x)
1 bit
0 ~ 1
0.0-511.7
0.0-511.7
0.0-511.7
0.0-895.7
0.0-
1023.7
byte (b)
8 bit
0 ~ FF
0-511
0-511
0-511
0-895
0-1023
word (w)
16 bit
0 ~ FFFF
0-510
0-510
0-510
0-894
0-1022
double-word
(dw)
32 bit
0 ~ FFFFFFFF
0-508
0-508
0-508
0-892
0-1020
long-word (lw)
64 bit
0 ~ FFFFFFFFFFFFFFFF
0-504
0-504
0-504
0-888
0-1016
short-int (si)
8 bit
-128 ~127
0-511
0-511
0-511
0-895
0-1023
int (i)
16 bit
-32768 ~ 32767
0-510
0-510
0-510
0-894
0-1022
double-int (di)
32 bit
-2147483648 ~ 2147483647
0-508
0-508
0-508
0-892
0-1020
long-int (li)
64 bit
-9223372036854775808 ~
9223372036854775807
0-504
0-504
0-504
0-888
0-1016
Real (r)
32 bit
-3.4E38 ~ +3.4E38
0-508
0-508
0-508
0-892
0-1020
long-real (lr)
64 bit
-1.797E308 ~ +1.797E308
0-504
0-504
0-504
0-888
0-1016
short-unsigned
(su)
8 bit
0 ~ 255
0-511
0-511
0-511
0-895
0-1023
unsigned (u)
16 bit
0 ~ 65535
0-510
0-510
0-510
0-894
0-1022
double -
unsigned (du)
32 bit
0 ~ 4294967295
0-508
0-508
0-508
0-892
0-1020
long-unsigned
(lu)
64 bit
0 ~
18446744073709551615
0-504
0-504
0-504
0-888
0-1016