User manual

IEC61131 User and Reference Manual
April 22, 2008
192
 An ain_filter value of 2 sets the input filter for 11Hz and the response time to 45ms
at 60Hz and 55ms at 50Hz.
 An ain_filter value of 3 sets the input filter for 30Hz and the response time to 30ms
at 60Hz and 30ms at 50Hz.
 To set the ain_filter parameter, click the ain_filter icon and then select the set / channel
parameter command from the Edit menu. The I/O Board parameter dialog is opened as
shown below.
 Enter the analog input filter type, 0 through 3, in the Value: entry field and click OK.
The scan_freq parameter sets the input scan rate for all analog inputs. The scan rate
selection is not critical but AC noise rejection is improved at the correct frequency. If the
module is used in a DC environment, the 60 Hz setting will yield slightly faster response
time.
 A scan_freq value of 0 synchronies the input scanning to 60Hz.
 A scan_freq value of 1 synchronies the input scanning to 50Hz.
 To set the scan_freq parameter, click the scan_freq icon and then select the set /
channel parameter command from the Edit menu. The I/O Board parameter dialog is
opened as shown below.
 Enter the scan frequency, 0 or 1, in the Value: entry field and click OK.
DIN Sub Module
The DIN sub-module provides eight I/O channels for the digital input data from the
SCADAPack ain5506 I/O hardware. These I/O channels indicate the status of the analog
input data. Data for each of the I/O channels may be connected to user-defined variables
with the I/O connection editor. Connected variables are updated continuously with data from
the SCADAPack 5506 I/O hardware.
The 5506 I/O Module provides 8 internal digital inputs, which indicate if the corresponding
analog input is in or out of range.
 Digital Input channel 1 returns the status of AIN channel 0.
OFF = AIN 0 is OK.
ON = AIN 0 is over or under range.
 Digital Input channel 2 returns the status of AIN channel 1.
OFF = AIN 0 is OK.
ON = AIN 0 is over or under range.