Micromod MOD: 30ML Functions Data Base Reference User Manual
Page 77
MOD 30ML Functions
BUILT-IN ANALOG INPUT BLOCK
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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
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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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