Feature register (R32) IP/IE3202

The module's fundamental settings can be modified in the feature register.

Write protection must first be cancelled in the code-word register before it is possible to write into this register (default: 0x0106).

Note

Attention

2-, 3- or 4-wire connection has to be the same in the registers of all four channels.

Bit	Value	Description		Manufacturer’s setting
0	0_bin	User scaling is inactive		0_bin
0	1_bin	User scaling is active (registers 33, 34)		0_bin
1	0_bin	Manufacturer scaling is inactive		1_bin
1	1_bin	Manufacturer scaling is active (registers 19, 20)		1_bin
2	0_bin	no function		0_bin
3	0_bin	Sign-amount representation is inactive		0_bin
3	1_bin	Sign-amount representation is active		0_bin
4	0_bin	Hide Siemens extension bits		0_bin
4	1_bin	Reveal Siemens extension bits		0_bin
5	0_bin	no function		0_bin
6	0_bin	no function		0_bin
7	0_bin	Deactivate manual filter setting in register 37		0_bin
7	1_bin	Activate manual filter setting in register 37		0_bin
8	0_bin	Deactivate over range protection		1_bin
8	1_bin	Activate over range protection If the temperature exceeds 850°C the status bits are correspondingly set and the output value is restricted to 850°C.		1_bin
10... 9	00_bin	Four-wire connection is activated (Attention: this has to be same for all four channels)		00_bin
	01_bin	Three-wire connection is activated^* (Attention: this has to be same for all four channels)
	10_bin	Two-wire connection is activated (Attention: this has to be same for all four channels)
11	0_bin	no function		0_bin
15...12	0_hex	PT100	-200°C - 850°C ± 0.3°C	0_hex
	1_hex	NI100	-60°C - 250°C ± 0.3°C
	2_hex	PT1000	-200°C - 850°C ± 0.3°C
	3_hex	PT500	-200°C - 850°C ± 0.5°C
	4_hex	PT200	-200°C - 850°C ± 0.3°C
	5_hex	NI1000	-200°C - 850°C ± 0.3°C
	6_hex	NI120	-80°C - 320°C ± 0.3°C
	7_hex	RSNE1000	Nickel 1000, special Siemens temperature curve
	E_hex	Ohm	10 - 5000 ohms (in 1/2 Ohm)
	F_hex	Ohm	10 -1200 ohms (in 1/10 Ohm)

^*) as from I/O circuit board firmware version 2 of IP3202 resp. as from I/O circuit board firmware version 0 of IE3202

Explanation of the sign bit

The default representation is twos complement, i.e. -1 is represented as 0xFFFF

Sign-amount representation is active, i.e. -1 is represented by 0x8001

Scaling example

Manufacturers scaling active, user scaling active, output in ohms, 10-5000 ohms
Register 34 0x0500 0.100 ohm / digit
Register 34 0x0400 0.125 ohm / digit
Register 34 0x0200 0.250 ohm / digit
Register 34 0x0100 0.500 ohm / digit
Register 34 0x0080 1.000 ohm / digit

Siemens output format (S5)

If the Siemens output format is selected, the lowest three bits are used to assess the status. The process data is represented in bits 3-15, where bit 15 is the arithmetic sign bit.

Bit	Name	Description
0	Overflow	0_bin	Value in Range
0	Overflow	1_bin	Value out of range
1	Error	0_bin	No error
1	Error	1_bin	Error
2	-	0_bin	reserverd
14...3	Value	0_bin	process data
15	Sign	0_bin	plus
15	Sign	1_bin	minus

Two-wire connection

A resistance can be measured directly through the two-wire connection. That proportion of the resistance represented by the connecting cables can be measured and entered in register 21. For two-wire connection, it is necessary to copy the raw ADC value from register 1 into register 22 while the conductor resistance is short-circuited (+RL -RL).

User scaling

Example of scaling to Fahrenheit