YOKOGAWA FA-M3 VITESSE F3CX04-0N, User Manual

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B3-2
IM 34M06H63-01E 1st Edition : July, 2003-00
B3.1 Setting Monitoring Parameters
Monitoring parameters are used for performing module-wide setup to suit the operating
environment and mode of use. They define the most basic operations of the module.
The setup elements are described in Section B3.1.1, “Power Supply Frequency
Selection”, Section B3.1.2, “Input Sampling Period” and Section B3.1.3, “Monitoring
Mode”. You should set these parameters to match the operating and usage
environment. Monitoring parameters must be enabled before any written content can
take effect. For details on how to enable such parameters, see Section B2.3, “How to
Enable Settings.”
CAUTION
Changing a monitoring parameter initializes other related parameters. Always set
monitoring parameters before setting input parameters and operation parameters.
B3.1.1 Power Supply Frequency Selection
Use this parameter to select a power supply frequency that matches the power supply
environment.
Table B3.1 Power Supply Frequency Selection
Data Position Number
Symbol Description Unit Data Range
Default
Value
Attribute Stored See Also
CH1 CH2 CH3 CH4
81 FREQ
Power supply
frequency selection
*1
None 0: 50Hz, 1: 60Hz 0 RW
*1

C2.2
*1 The power supply frequency can also be selected using a hardware switch selector. For details on how to do so, see
Section A4.1, “Selecting Input Types and Power Supply Frequency”. If the power supply frequency is set using the
hardware switch selector, the setting cannot be changed by software.
Selecting an appropriate power supply frequency reduces interference of common mode
noise from the power supply on input signals.
B3.1.2 Input Sampling Period
This parameter sets the input sampling period. Beware that a short sampling period
restricts the number of available channels.
Table B3.2 Input Sampling Period
Data Position Number
Symbol Description Unit Data Range
Default
Value
Attribute Stored See Also
CH1 CH2 CH3 CH4
82 SMP
Input Sampling period
None
0: 100ms, 1: 200ms
*1
1
RW


*1 This preset value restricts somewhat the number of available channels. A value of 100ms allows up to 2 channels to
be used, whilst a value of 200ms allows up to 4 channels to be used. Table B3.3 lists the usable channels for various
preset values.
Table B3.3 Mapping between Input Sampling Period and Usable Channels
Input Sampling Period
Preset
Value
Usable Channels
*1
Remarks
1 2 3 4
100ms 0
 
 
200ms 1
   
Default Value
*1 ‘

’ : usable; ‘

‘: not usable.