Siemens S5-135U/155U appendix Measured-Value Representation, Digital, Rated input range $ 50 mV

Analog Input/Output Modules

9.3.14Measured-Value Representation

Digital	(rated input range $ 50 mV)
Measured-Value
Representation as
Two's Complement

Units	Input Volt-				Byte 0
	age in mV	7	6	5	4	3	2	1	0
		212	211	210	29	28	27	26	25
w4096	100.0	0	1	1	1	1	1	1	1
4095	99.976	0	1	1	1	1	1	1	1
2049	50.024	0	1	0	0	0	0	0	0
2048	50.0	0	1	0	0	0	0	0	0
2047	49.976	0	0	1	1	1	1	1	1
	25.0		0	1	0	0	0	0	0
1024		0
1023	23.976	0	0	0	1	1	1	1	1
	0.024		0	0	0	0	0	0	0
1		0
0	0.0	0	0	0	0	0	0	0	0
±1	±0.024	1	1	1	1	1	1	1	1
	± 24.976		1	1	0	0	0	0	0
±1023		1
±1024	± 25.0	1	1	1	0	0	0	0	0
	± 49.976		1	0	0	0	0	0	0
±2047		1
±2048	± 50.0	1	1	0	0	0	0	0	0
±2049	± 50.024	1	0	1	1	1	1	1	1
±4095	± 99.976	1	0	0	0	0	0	0	0
±4096	±100.0	1	0	0	0	0	0	0	0

			Byte 1
7	6	5	4	3	2	1	0
24	23	22	21	20	A E OV
1	1	1	1	1	0/1	0/1	1	Overflow
1	1	1	1	1	0/1	0/1	0	Overrange
0	0	0	0	1	0/1	0/1	0
0	0	0	0	0	0/1	0/1	0
1	1	1	1	1	0/1	0/1	0
0	0	0	0	0	0/1	0/1	0
1	1	1	1	1	0/1	0/1	0
0	0	0	0	1	0/1	0/1	0
0	0	0	0	0	0/1	0/1	0	Rated
1	1	1	1	1	0/1	0/1	0	range
0	0	0	0	1	0/1	0/1	0
0	0	0	0	0	0/1	0/1	0
0	0	0	0	1	0/1	0/1	0
0	0	0	0	0	0/1	0/1	0
1	1	1	1	1	0/1	0/1	0	Overrange
0	0	0	0	1	0/1	0/1	0
0	0	0	0	1	0/1	0/1	1	Overflow

A = Active bit

E = Error bit

OV = Overflow bit

9-24	System Manual
	C79000-G8576-C199-06