User manual

IEC61131 User and Reference Manual
April 22, 2008
186
ain5505
5505 Analog Input Module
Description
The ain5505 module provides four RTD analog input points from a 5505 RTD module. A
maximum of sixteen 5505 RTD modules may be installed on the I/O bus. The 5505 RTD
module can operate in Native mode or in 5503 Emulation Mode. The operating mode is
determined via a DIP switch on the 5505 RTD module. Refer to the Control Microsystems
Hardware Manual for details on the DIP switch settings for the module.
When using the 5505 RTD module in 5503 Emulation mode the ain5503 module is used in
the I/O Connection. See the ain5503 section if the module is to be used in 5503 Emulation
mode.
The 5505 RTD module native mode provides enhanced capability over the 5503 emulation
mode. The module operates in native mode if the 5503 Emulation DIP switch is open. This
mode is recommended for all new installations.
 Each input is individually configurable for resistance measurement or RTD
temperature measurement
 Each RTD input is configurable to return the measured temperature in degrees
Celsius, Kelvin, or Fahrenheit.
 All inputs have a common configurable filter rate that can be used to dampen
process variations or noise.
 The module returns diagnostic and status information for each input, such as RTD
type (3 or 4 wire), open RTD annunciation, and RTD out of range annunciation.
 Data is returned as an IEEE 32 bit, single precision floating point number that
requires no additional scaling.
RTD data is assigned to eight consecutive input (3xxxx) registers, two for each floating point
RTD value. The input registers are updated continuously with data read from the analog
inputs.
The 5505 RTD module provides 16 internal digital input (1xxxx) registers that return status
and diagnostic information about the RTDs. The digital input registers are updated
continuously with data read from the digital inputs.
AIN Sub Module
The AIN sub module provides four I/O channels from 5505 RTD Analog input hardware.
Data for each of the four 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
5503 RTD Analog input hardware.
In addition to the eight I/O channels the AIN sub-module provides I/O Board parameters that
include the module address, type of data returned from the 5505 RTD module, for each RTD
input, and the filtering used by all RTD inputs.
The module_address parameter defines the module address of the ain5505 I/O module.
The address on the module is selected via dipswitches on the module. A maximum of
sixteen SCADAPack 5505 I/O type modules may be added to a system.
 To set the module address, click the module address icon and then select the set /
channel parameter command from the Edit menu. The I/O Board parameter dialog is
opened as shown below.