User manual

915U-2 Wireless I/O Page 51
Page 51 User Manual
The following table shows the basic onboard I/O available in a standard 915U-2 module
with no expansion I/O connected. For a more detailed I/O map (showing the full register
range), see Appendix B: “I/O Store Registers” at the end of the manual.
4.2.4 Standard 915U-2 I/O (Basic I/O)
Address
Input / Output Description
0001 - 0008
Local DIO1 – DIO8 (as Outputs)
10001 - 10008
Local DIO1 – DIO8 (as inputs)
10009 - 10020
Setpoint status from Analog inputs 1 through 12. (AI1, 2, 3, 4
Current Mode), (Internal Supplies), (AI1, 2, 3, 4 Voltage Mode)
30001 - 30004
Local AI1 – AI4. (Current Mode)
( AI1, AI2 4-20mA diff, AI3, AI4 4-20mA Sink)
30005
30006
30007
30008
Local Supply voltage (8-40V default scaling)
Local 24V loop voltage (8-40V default scaling)
Local Battery voltage (8-40V default scaling)
115S Expansion I/O Supply Voltage (8-40V default scaling)
30009 - 30012
Local AI1 – AI4. (Voltage Mode) ( AI1, AI2 0-25V, AI3, AI4 0-5V)
30013 - 30016
Local Pulse rate inputs PI1 – PI4
36001 - 36008
Local Pulsed input counts – (PI1 Most significant word is 36001 and
Least significant word is 36002)
38001 - 38032
Local Analog inputs as Floating point values (mA, Volts or Hz)
40001 - 40002
Local AO1 – AO2
48001 - 48002
Local AO1 – AO2 as floating point values (mA)
4.2.5 I/O Configuration
I/O configuration is done using the Configuration software and each I/O has different
characteristics that can be tailored to applications.
The parameters for each I/O I will explain below.
Digital Inputs
Name – The inputs can be named to help with configuration or use the default, up to 30
characters including spaces.
Debounce Time (sec) – Debounce is the time which an input must stay stable before
the module decides that a change of state has occurred. If a digital input changes (on -
off) and changes again (off - on) in less than the debounce time, then the module will
ignore both changes. Default debounce time is 0.5 seconds.