Siemens S5-135U/155U appendix Value and sign measuring range $ 1.25 V and $ 2.5 V bipolar

Analog Input/Output Modules

Two's complement; measuring range $ 1.25 V and $ 2.5 V; bipolar

Units

2047

2046

:

0001

0000

±0001

:

±2047

±2048

Measured

Value in V

($ 1.25 V)

1.2494

1.2488

:

0.0006

0.0000

±0.0006

:

±1.2494

±1.2500

Measured				Byte 0
Value in V	7	6	5	4	3	2	1	0
($ 2.5 V)
	212	211	210	29	28	27	26	25
2.4988	0	0	1	1	1	1	1	1
2.4975	0	0	1	1	1	1	1	1
:				:
0.0012	0	0	0	0	0	0	0	0
0.0000	0	0	0	0	0	0	0	0
±0.0012	1	1	1	1	1	1	1	1
:				:
±2.4988	1	1	0	0	0	0	0	0
±2.5000	1	1	0	0	0	0	0	0
A = Active bit
E = Error bit

O = Overflow bit

				Byte 1
7	6	5	4	3	2	1	0
24	23	22	21	20	A	E	O
1	1	1	1	1	0	0	1
1	1	1	1	0	0	0	0
				:
0	0	0	0	1	0	0	0
0	0	0	0	0	0	0	0
1	1	1	1	1	0	0	0
						:
0	0	0	0	1	0	0	0
0	0	0	0	0	0	0	1

Value and sign; measuring range $ 1.25 V and $ 2.5 V; bipolar

Units

2047

2046

:

0001

0000

±0001

:

±2047

±2048

Measured

Value in V

($ 1.25 V)

1.2494

1.2488

:

0.0006

0.0000

±0.0006

:

±1.2494

±1.2500

Measured				Byte 0
Value in V	7	6	5	4	3	2	1	0
($ 2.5 V)
	212	211	210	29	28	27	26	25
2.4988	0	0	1	1	1	1	1	1
2.4975	0	0	1	1	1	1	1	1
:				:
0.0012	0	0	0	0	0	0	0	0
0.0000	0	0	0	0	0	0	0	0
±0.0012	1	0	0	0	0	0	0	0
:				:
±2.4988	1	0	1	1	1	1	1	1
±2.5000	1	1	0	0	0	0	0	0
A = Active bit
E = Error bit

O = Overflow bit

				Byte 1
7	6	5	4	3	2	1	0
24	23	22	21	20	A	E	O
1	1	1	1	1	0	0	1
1	1	1	1	0	0	0	0
				:
0	0	0	0	1	0	0	0
0	0	0	0	0	0	0	0
0	0	0	0	0	0	0	0
						:
1	1	1	1	1	0	0	0
0	0	0	0	0	0	0	1

Binary; measuring range $ 1.25 V and $ 2.5 V; bipolar

Units

4095

4094

:

2049

2048

2047

:

0001

0000

Measured

Value in V

($ 1.25 V)

1.2494

1.2488

:

0.0006

0.0000

±0.0006

:

±1.2494

±1.2500

Measured

Value in V

($ 2.5 V)

2.4988

2.4975

:

0.0012

0.0000

±0.0012

:

±2.4988

±2.5000

			Byte 0
	6	5	4	3	2	1	0
7
212	211	210	29	28	27	26	25
0	1	1	1	1	1	1	1
0	1	1	1	1	1	1	1
			:
0	1	0	0	0	0	0	0
0	1	0	0	0	0	0	0
0	0	1	1	1	1	1	1
0	0	0	0	0	0	0	0
0	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	0	1
1	1	1	1	0	0	0	0
				:
0	0	0	0	1	0	0	0
0	0	0	0	0	0	0	0
1	1	1	1	1	0	0	0
				:
0	0	0	0	1	0	0	0
0	0	0	0	0	0	0	1

*Same representation for the data formats:

two's complement, value and sign, binary representation.

A = Active bit

E = Error bit

O = Overflow bit

9-94	System Manual
	C79000-G8576-C199-06