Carel ir33 Universale series User Manual page 27

5.5.1 Dependence (parameters c34,c38,c42,c46)
This the parameter that determines the specifi c function of each output.
It links an output to a set point (control output) or a specifi c alarm (alarm
output). Parameters c34,c38,c42,c46 correspond respectively to outputs
1,2,3,4, and the selection fi eld ranges from 0 to 17.
Dependence = 0: the output is not enabled. This is the value set on
versions V and W for the outputs that are not available (that is 2, 3 & 4 for
version V, 3 & 4 for version W).
Dependence = 1 & 2: the output is the control output and refers to St1/
P1 and St2/P2 respectively. In the subsequent special parameters, "type
of output", "activation" and "diff erential/logic", the operation of the output
can be defi ned completely.
Dependence = 3 to 14: the output is associated with one or more alarms.
See the chapter on "Alarms" for the complete list.
Dependence = 15: "timer" operation. The output becomes independent
of the measurement, set points, diff erentials, etc. and continues to switch
periodically at a period=c12 (cycle time). The ON time (T_ON) is defi ned by
the "activation" parameter as a percentage of the set cycle time. If an alarm
occurs or the controller is switched OFF, "timer" operation is deactivated.
For further information, see the description of the parameters "type of
output", "activation".
Dependence = 16: the output is the control output: the association St1/
P1 and St2/P2 depends on the status of digital input 1. If the input is open,
reference will be to St1/P1; if the input is closed, reference will be to St2/
P2. Changing the set point also reverses the operating logic.Dependence
= 17: the output is the control output: the association St1/P1 and St2/P2
depends on the status of digital input 1. If the input is open, reference will
be to St1/P1; if the input is closed, reference will be to St2/P2. Changing
the set point maintains the operating logic.
DEPENDENCE OUTPUT
VALUE
0 not active
1 relative to St1
2 relative to St2
3 active with alarm from digital input
4 active with alarm from digital input
5 active with serious and "High" alarms E04)
6 active with serious and "High" alarms (E04)
7 active with serious and "Low" alarms (E05)
8 active with serious and "Low" alarms (E05)
9 active with "Low" alarm (E05)
10 active with "Low" alarm (E05)
11 active with "High" alarm (E04)
12 active with "High" alarm (E04)
13 active with serious alarm
14 active with serious alarm
15 TIMER operation
16 operation of the output dependent on the
status of digital input 1 with reversal of the
operating logic
17 operation of the output dependent on the
status of digital input 1 with operating logic
maintained
Alarm relay OFF =output normally deactivated; energised with alarm.
Alarm relay ON = output normally activated; de-energised with alarm.
When ON the relay is normally active: it is deactivated with an alarm.
This is an intrinsic safety feature, as the contact switches, and thus the
alarm is signalled, even if there is a power failure,
serious faults on the controller or a data memory alarm (E07/E08.)
In the models B and E, for the outputs 2 and 4, the dependence may be
only 0, 1, 2.
5.5.2 Type of output (parameters c35,c39,c43,c47)
The parameter is active only if the output is the control output
("dependence"=1,2,16,17) or TIMER ("dependence"=15).
Type of output=0: the output is on/off .
Type of output=1: the output is PWM or "timer".
"Timer" operation is combined with "dependence"=15.
In the models B and E, the output type will always be 0 to 10 Vdc
independently from the value of this parameter.
5.5.3 Activation (parameters c36,c40,c44,c48)
The parameter is active only if the output is the control output
("dependence"=1,2,16,17) or TIMER ("dependence"=15).
If "dependence"=1, 2, 16 and 17 it represents, for ON/OFF operation, the
activation point of the output while, for PWM operation, it indicates the
point where the output has the maximum value. The "activation" parameter
is expressed as a percentage, from -100 to +100 and refers to the operating
diff erential and the set point that the output refers to. If the output refers to St1
("dependence"=1), "activation" is relative to the percentage value of P1; if the
output refers to St2 ("dependence"= 2), "activation" is relative to the percentage
value of P2.
If the value of "activation" is positive, the activation point is to the 'right' of the
set point, while if negative it is to the 'left' .
If "dependence"=15 & "type of output"=1, the "activation" parameter defi nes
the ON time as a percentage of the period (c12); in this case, "activation" must
only have positive values (1 to 99)..
Example 1:
The fi gure below shows the activation points on a controller with 2
outputs, with the following parameters:
St1=10, St2=20, P1=P2=6
OUT1 (point A): "dependence"=c34=1, "activation"= c36=-100;
OUT2 (point B): "dependence"=c38=2, "activation"= c40= +75.
A=4; B=24.5
ALARM RELAY
STATUS IN
NORMAL
CONDITIONS
-
-
-
Key
OFF
St1/2
ON
P1
OFF
P2
ON
OUT1/2
OFF
B1
ON
OFF
Example 2
ON
A "timer" output is selected with "dependence"=15, "type of output"=1
OFF
ON and "activation" (ON percentage) between 1 and 99, with a cycle time set
OFF
by c12. Below OUT1 and OUT2 are proposed as "timer" outputs with c36
ON
greater than c40, example:
-
OUT1: c34=15, c35=1, c36=50; OUT2: c38=15, c39=1, c40=25.
-
-
Key
t
c12
OUT1/2
TON_1
TON_2
5.5.4 Diff erential/logic ( parameters c37,c41,c45,c49)
The "diff erential/logic" parameter is only active if the output is the control
output ("dependence"=1,2,16,17). Like the "activation" parameter, it is
expressed as a percentage and is used to defi ne the hysteresis of the
27
OUT1 OUT2
A
c36=-100
c40=+75
P1=6 P1=6 P2=6 P2=6
St1=10 St2=20
Set point 1/2
Diff erential for output 1
Diff erential for output 2
Output 1/2
Probe 1
ON
OUT1
OFF
TON_1
c12
ON
OUT2
OFF
c12
time
cycle time
Output 1/2
(c36*c12)/100
(c40*c12)/100
ir33 universale +030220801 - rel. 1.0 - 16.04.2008
ENG
ON
B
OFF
B1
TON_2
t