Siemens S5-135U/155U appendix Measured-Value, Representation for, Ohm 10 units

Analog Input/Output Modules

Measured-Value	The resolution with Pt 100 resistance thermometers is approximately 0.25 oC.
Representation for	1 ohm ￿ 10 units
Resistance
Thermometers in
the Standard Pt
100 Range

Units	Resistance in	Temper-
	ohms	ature in
		oC
4096	400.0	±
4095	399.90	±
2049	200.98	269.1
2048	200.0	266.5
2047	199.90	266.0
1024	100.00	0
1023	99.90	±0.2
1	0.098	±
0	0.0	±

		Byte 0									Byte 1
7	6	5	4	3	2	1	0		6	5	4	3	2	1	0
								7
S 211 210 29 28 27 26 25								24 23 22 21 20 A E OV
0	1	1	1	1	1	1	1	1	1	1	1	1	0/1	0/1	1	Overflow
0	1	1	1	1	1	1	1	1	1	1	1	1	0/1	0/1	0	Overrange
0	1	0	0	0	0	0	0	0	0	0	0	1	0/1	0/1	0
0	1	0	0	0	0	0	0	0	0	0	0	0	0/1	0/1	0
0	0	1	1	1	1	1	1	1	1	1	1	1	0/1	0/1	0
0	0	1	0	0	0	0	0	0	0	0	0	0	0/1	0/1	0	Rated range
0	0	0	1	1	1	1	1	1	1	1	1	1	0/1	0/1	0
0	0	0	0	0	0	0	0		0	0	0	1	0/1	0/1	0
								0
0	0	0	0	0	0	0	0	0	0	0	0	0	0/1	0/1	0

	A = Active bit
	E = Error bit
	OV = Overflow bit
	S = Sign
	When Pt 100 resistance thermometers are connected, the maximum
	temperature in the rated range is 266 oC. If it can be ensured that the
	temperature does not exceed 850 oC, the input value may extend into the
	overrange. The resolution is then 4095 units. Unused inputs can be utilized
	for voltage measurements in the 500 mV range (see front connector
	assignments).
Extended Pt 100	In addition to the standard Pt 100 range, there is an extended Pt 100 range on
Range	the 460 analog input module. You can select this with the mode switch.
	The following is printed on the cover of the module to set the Pt 100 mode:
	Standard range: ªresistance thermometer uncompensated full rangeº
	Extended range: ªresistance thermometer compensated low rangeº
	In this range, the basic resistance of the Pt 100 at 0 oC (100 ohms) is
	compensated for on the module. As in the standard range, the Pt 100 is fed
	with a constant current of 2.5 mA. Using the overrange (- 100 mV to + 100
	mV), this results in a temperature range of approx. -100 °C to + 100 °C.
	This measuring range of 200 °C is resolved to 8192 units with the correct
	sign for the temperature. One unit thus corresponds to approximately 0.025
	°C. If you select the extended Pt 100 range, you can use all 8 analog inputs in
	this range only.
	You should only use the 6ES5 498-1AA11 range card ($ 50 mV/500 mV).

9-26	System Manual
	C79000-G8576-C199-06