Automatic control function programming manual ladder language

9.1 General
Analogue Inputs/Outputs
A maximum of 18 DACs and 20 ADCs are available on NUM 1060 systems. The analogue inputs and outputs are
accessible to the user programme, part programme and dynamic operators. They are distributed as follows:
Machine processor card 8I/8O analogue card
(max. 2 cards)
UCSII card
1060 series I 4 ADCs - 2 DACs 8 ADCs/8 DACs
1060 series II 4 ADCs - 2 DACs 8 ADCs/8 DACs
1060 series II 2 ADCs/1 DAC
The analogue inputs and outputs are geographically identified by the card slot number and the channel number on
the card. The code is one byte.
Bits 0 to 3 of the byte contain the channel number (0 to 7) and bits 4 to 7 the card number.
The CPU is number 1.
Rate of variation
The analogue inputs and outputs are signed values on 16 bits. The rate of variation for these values is:
- for positive values:
from 0 --> 0x7FFF
for 0 --> n volts (where n is the full scale value)
- for negative values:
from 0xFFFF --> 0x8000
for 0 --> n volts (where n is the full scale value).
This is true regardless of the resolution of the ADC or DAC (8 or 12 bits).
The full scale value depends on the characteristics of the card used (see Installation and Commissioning Manual).
The accuracy depends on the DAC or ADC format (8 bits, 8 bits + sign or 12 bits + sign).
9.2 Configure an Analogue I/O Card anas
Syntax
anas(cch, wconfig)
cch: Card address code (the channel is not significant).
config: Configuration, encoded on 16 bits.
Operation
This function is used to configure the number of analogue inputs used (1 or 8) and the gain of each input (1 or 10).
The internal refresh period of each analogue input is 1.36 ms when all the 8 inputs are configured and 0.170 ms when
only one input is configured (input 0).
This function is optional. At system initialisation, the cards are configured with 8 inputs and a gain of 1.
REMARK This function concerns only the analogue inputs and outputs on the additional cards.
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