C3-7
IM 34M06H62-02E 2nd Edition : June 2008-00
C3.2 Power Frequency Selection
Power frequency may be set either by switches or software. Power frequency selection
by software is available only when switches SW1-4 = OFF and SW5=0. The default value
is determined by SW1-2.
An appropriate power frequency setting reduces the interference of common-mode noise
from the power supply on input signals.
The parameter used is as follows:
Table C3.4 Power Frequency Parameter
Data Position Number
Symbol Description Unit Data Range
Default
Value
Attribute Stored
Loop 1 Loop 2 Loop 3 Loop 4
81 FREQ
Power frequency
selection
*1
None 0: 50 Hz, 1: 60 Hz 0 RW
*1
*1 The default value is either 0 or 1 depending on the setting of SW1-2. Power frequency may also be set with SW1-2. For
details, see Section A4.1, "Selecting Input Type and Power Frequency." Switch setting takes precedence over parameter
setting.
The I/O parameters, including the input type selection (IN) parameter, must be enabled
before their settings can take effect. For details, see Section B2.3, "How to Enable
Settings."
CAUTION
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