Satchwell IAC 600, Manual

Page: 3 / 24

GENERAL NOTES
1. The IAC uses two types of signal internally. They are as follows:-
Analogue Values from –10,000 to +10,000 these represent temperature (
°
C,
°
F), Voltages, Ohms, Lux and control outputs.
Digital signals, these signals are either On or Off.
2. Analogue inputs or outputs cannot be directly connected to Digital inputs or outputs. To convert an analogue value to a digital signal use a
threshold module.
3. When handling Voltage or controller output signals you should note that values are in the range of 0 to 100 where 0 = Off or 0 Volts and
100 = full On or 10 Volts.
4.
°
C,
°
F, Ohms and Lux are all displayed as actual values e.g. 20
°
C = 20, 68
°
F = 68, 2000 Ohms = 2000 etc.
5. When using a controller module for single stage only the unused stage should be set as follows:-
Proportional Band = 10,000
Integral Action Time = 0
Derivative Action Time = 0
Ramp Time = 0
6. Maximum of 100 links between modules per IAC base unit.
MODULES AND FUNCTIONS
Bubbleland
Symbol
Module Range Default
INPUT/OUTPUT MODULES
DIGITAL INPUT MODULE
x 8
Current State of Input (review only)
This parameter displays the current input state. On or Off –
Latch Input
This parameter allows the digital input to be latched so that a
momentary input will switch the module on and a second input will
switch it off. Yes or No No
Toggle
This parameter switches a latched input into the opposite state.
On or Off –
TEMPERATURE (RESISTIVE) INPUT MODULES
x 6
Current Measured Value (review only)
This parameter displays the current input value in the selected units. –40 to 150
°
C
–40 to 302
°
F
250 to 9750
Ω
0 to 10,000 Lux
–
Units Selection
This parameter selects the units that can be used for the input.
°
C,
°
F, Ohms or Lux
°
C
ANALOGUE INPUT MODULES (VOLTAGE)
x 6
Current Measured Value as a percentage of 10 Volts (review only) 0 to 100% –
DIGITAL (TRIAC) OUTPUT MODULES
x 8
Output State (review only) On or Off –
Override State None, On or Off None
ANALOGUE OUTPUT MODULES
x 4
Current Output Value as a percentage of 10 Volts (review only) 0 to 100% –
Override Value
e.g. 0 = 0V, 50 = 5V, 100 = 10V 0 to 100% 0%
Enable Override On or Off Off
MATHS MODULES
SUBTRACTION, MULTIPLICATION, DIVISION AND
ADDITION MODULES
x 8, total number of any combination
These modules allow mathematical operations to be carried out on
values within the controller. Each module can accept two value inputs
and the module will produce a value output. The addition module is
shown, left.
SAMPLE AND HOLD MODULE
x 6
This module is used to sample an Analogue value when the Digital
input on the module is momentarily switched on. The sample module
will then output the current sample value. The module will keep the
value until the next time the Digital input is set to on, at which point
another sample is taken.
NOTE:- If the Digital input is left set at on, the output of the module will
follow the module input.
HYSTERESIS MODULE
x 8
This module is used to pass on a change in value only when that
change is greater than the value set in the module. When a change is
passed through the digital output is switched on briefly. This can be
used to drive the Logging module for event based logging.
Hysteresis 0 to 10,000 1
ANALOGUE SWITCH MODULE
x 6
This module switches an analogue output between two analogue
inputs. The switching is triggered by a digital input state. Possible
applications are sensor selection, override of fan speeds/actuator
position etc.
05/98 3 - 24 DS 2.951A