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1 commissioning the sm 431; ai 8 x rtd x 16 bit – Siemens Simatic S7-400 User Manual

Page 342

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Analog Modules

5-126

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

5.23.1

Commissioning the SM 431; AI 8

RTD

16 Bit

You set the mode of operation of the SM 431; AI 8

RTD

16 Bit in STEP 7.

Parameters

You will find a description of the general procedure for assigning parameters to
analog modules in Section 5.7.

An overview of the parameters that you can set and their default settings are
shown in the table below.

Table 5-71 Parameters of the SM 431; AI 8

RTD

16 Bit

Parameter

Value Range

Default

2)

Parameter

Type

Scope

Enable

Diagnostic interrupt

1)

Hardware interrupt

1)

Yes/no
Yes/no

No
No

Dynamic

Module

Destination CPU for
interrupt

1 to 4

Static

Module

Trigger for hardware
interrupt

3)

Dynamic

Channel

High limit

Low limit

32767 to – 32768

– 32768 to 32767

Dynamic

Channel

Diagnostics

Wire break

Underflow

Overflow

Yes/no
Yes/no
Yes/no

No
No
No

Measurement

Measuring type

Disabled
RTD-4L Thermal resistor

(linear, four-conductor
terminal)

RTD-3L Thermal resistor

(linear, three-conductor
terminal)

RTD-3L

Static

Channel

Measuring range

Refer to Section 5.23.2 for the
measuring ranges of the input
channels that you can set.

Pt 100
standard

Temperature unit

Degrees Celsius; degrees
Fahrenheit

Degrees
Celsius

Static

Module

Temperature
coefficient for
temperature
measurement with
thermal resistor (RTD)

For platinium (Pt)
0.00385

W/W

/

°

C

0.003916

W/W

/

°

C

0.003902

W/W

/

°

C

0.003920

W/W

/

°

C

For nickel (Ni)
0.00618

W/W

/

°

C

0.00672

W/W

/

°

C

0.00385

Static

Channel

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