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Micromod MOD: 30ML Functions Data Base Reference User Manual

Page 77

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MOD 30ML Functions

BUILT-IN ANALOG INPUT BLOCK

13

Input Type

(INTYPE)......................................................................................................... C – R

Configuration of this parameter identifies the type of input to which the AIN block applies.
Input types are as follows:

VOLTS

1

Input range is -10 mV to +6V dc.

CURRENT

2

This selection applies to either 2-wire or non 2-wire inputs.
Input range is 0 to 54 mA.

MILLIVOLTS

3

Input range is -10 mV to +120 mV dc .

THERMOCOUPLE

4

When this input type is selected and cold junction
compensation is required, the compensation must be
obtained from an external source. The input range is -10
mV to +120 mV dc

TC + CJC

5

This selection (thermocouple with cold junction
compensation) provides the following:

• For Input 1, cold junction compensation is available from a

temperature sensor that is part of the built-in input circuit.

• For Input 2, the cold junction compensation value can only be

set by the operator because the Cold Junction Compensation
Mode (Attr #40) must be LOCAL for Input 2.

• The thermocouple input range is -10 mV to +120 mV dc.

NOTE: If input 2 is a thermocouple input requiring cold junction
compensation, an Input Type selection of THERMOCOUPLE is
recommended. With this selection, cold junction compensation can
be obtained externally from the AIN1 block if Input 1 is a
thermocouple, or from another external source such as an RIM block
if Input 1 is not a thermocouple. See Section 2.7.3 for block
connection information.

RESISTANCE 6

Input range is 0 to 430 ohms.

RTD

7

This selection applies to either a 2-wire or 3-wire RTD. Input range
is 0 to 430 ohms

14

Mode

(MODE)..................................................................................................................... CWR

The mode of the block is determined by configuring and/or writing this attribute. Switching
mode is a reportable event.

MAN

0

The block result can be user written and the result quality is marked
good. The block input is the previous result or the last written result.

AUTO

1

The block input is processed using current data from the built-in
circuit.

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