A4-2
IM 34M06H62-02E 2nd Edition : June 2008-00
A4.1 Selecting Input Types and Power
Frequency
This section describes how to select appropriate input types for given temperature ranges
and how to select a suitable power frequency for a given power supply environment.
Figure A4.2 shows the hardware switches for selecting input types and power frequency.
Note: This is the right side view of the module with its cover removed.
SW5: Input type selector switch
(Input type is determined by the
combined values of SW1-3, SW1-4, and SW5.)
SW1-1: Temperature unit selector switch
SW1-2: Power frequency selector switch
SW1-3: Input type selector switch
SW1-4: Input type selector switch
Figure A4.2 Input Types and Power Frequency Selector Switches
Use switches SW1-1, SW1-3, SW1-4 and SW5 to perform input setup. SW1-4 and SW5
together specifies an input type, which apply to all loops, while SW1-3 specifies a
resolution and SW1-1 specifies the temperature unit for all loops. For the various switch
combinations and their corresponding input type and resolution values, see Table 4.1,
“Input Type Selection”.
Use SW1-2 to select a power frequency corresponding to the AC power used in the
equipment. For the mapping between SW1-2 and frequency, see Table 4.2, “Power
Frequency Settings”. Selecting an appropriate power frequency will reduce interference
from common mode noise.
You can also set input types and power frequency using data registers. To do so, set the
input type selector switches to “set by software”, that is, “SW5=0; SW1-4=OFF”. This will
mean that the power frequency will also have to be set using data registers. The factory
switch setting is “set by software.”
For details on input type selection and power frequency selection, see Section C3.1,
“Input Type Selection” and Section C3.2, “Power Frequency Selection” respectively.
Always turn off the power before performing switch setup.
You may switch the temperature unit between C and F using SW1-1. For details, see
Section C11, “Selecting Temperature Unit.”
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