Functions; Analog Output Channels; Analog Input Channels - Addi-Data ADDIALOG PA 3110 Technical Description

PA 3110
8

FUNCTIONS

8.1

Analog output channels

The board has 4 or 8 analog output channels.
They are set to a defined level after Power-ON Reset.
Update of the channels
1- 16-bit write commands on I/O addresses
2- dummy read
A bit of the Status Register indicates whether all channels are ready for updating.
Watchdog
A watchdog function is available through Timer2, which must be programmed as a
retriggerable watchdog.
The watchdog is triggered through a write command on the output channels.
As long as data is written on the output channels, they are not reset.
The watchdog can also generate interrupts.
The state of the watchdog is indicated in the Status Register.
8.2

Analog input channels

Up to 16 analog signals can be connected to the board.
It is possible to configure either ground-related or differential measurings
(jumper-selectable).
After having reached the multiplexer (time-multiplexed system) through a filter (RC
shield), the signals are led through a programmable gain amplifier to the 16-bit A/D
converter.
Configuration through software
- analog input ranges 0-10 V (unipolar) and ± 10 V (bipolar)
- gain
It is possible to use a different voltage (or current) for each channel,
and to use the highest resolution of the A/D converter.
Scan list
This list allows to acquire data in a more flexible way.
It can be stored in a 16-byte RAM.
The depth is determined through software.
28
Technical description Chapter 8