TCY3-T0121R Engineering Manual
Doc: 70-000002 V1.0, 20101115
© Vector Controls GmbH, Switzerland
Page 15
Subject to alteration
Output Configuration
General
An output must be assigned to a function or a control loop using the
OP
parameter set. Assigning an output to a control
function will automatically activate the respective function. Unassigned functions are not active.
Alarm function
The alarm setting defines how the output should respond to a specific alarm
condition. In case of an alarm the output may be switched on (100%) or off (0%).
The alarm situation takes precedence over operating state and calculated output
signal.
Analog Output
AO
0…10V
0…20m
A
█
The analog output may be configured with jumpers for 0-10 VDC or 0-20 mA control signals. The jumper is
located on the front side of the power part. The drawing on the right indicates the jumper placement for each
signal type. The factory setting is 0-10 VDC. Only place the jumper vertically. Only place one jumper for one
signal. The signal range can be specified in software by setting a minimum and a maximum limit. The limits are
in percent of the full range.
Special functions of the analog output:
Manual
Positions the output directly with a set point. The number of positioning steps can be
selected: 2, 10, 100 steps
Dehumidifying
(only for 4-pipe systems)
The maximum value is taken of both direct acting PID sequences (Cooling and
dehumidifying). Cooling will start to operate if the humidity gets too high, even if there is
no cooling need, thus the heating will be forced to come into play, which in turn
dehumidifies the air.
VAV
In the VAV control sequence, at peak cooling the airflow setpoint is the maximum amount
of air the VAV box is set to deliver. It may be adjusted through the maximum limit on the
analog output (
OP03
). As cooling requirements decrease, airflow dwindles until it reaches
its minimum setpoint. This setpoint will be based on the airflow needed at design cooling
and is typically 10% to 15% of maximum cooling airflow. Minimum airflow can be adjusted
by the minimum limit on the analog output (
OP02
). When it reaches this minimum, the
system is in its dead band and is neither heating nor cooling. As the system moves into
heating mode, the airflow rate increases until it reaches the maximum airflow required for
heating mode. This is typically 30 to 50% of maximum airflow of cooling mode. The
parameter for this is called VAV function: maximum limitation in heating mode (
OP05
).
Binary-Function
(AER-C13)
The analog output may be converted into three binary outputs by use of an accessory
(AER-C13). Instead of the PID sequence, the on/off sequence for 3 binary sequences is
enabled. The binary output may be enabled for all the lp1 and lp2 sequences.
Switching voltages are fixed to following output levels:
Stage 0
Stage 1
Stage 2
Stage 3
0% 40%
70%
100%
Sensor and setpoint
feedback
Internal humidity and temperature sensor values as well as set points may be transmitted
on the analog outputs. Minimum and maximum value of the feedback value may be set for
loop 1 (Temperature), Loop 2 is fixed to 0…100%. The alarm output level will be activated
in case a sensor is in error mode.
Feedback of floating output
The position of the floating output is calculated according to the sum of opening and
closing time of the actuator. The total running time of the actuator must be entered.
Heating
Cooling
100
50
0
T [°C, F]
Y
H1
, Y
R1
Y
C1,
Y
D1
W
C
W
H
VAV heat max: OP05
AO min: OP02
AO max: OP03
X
DZ
U [V, mA]
Priority for output control
1.
Alarm Level High,
2.
Operation mode OFF
3.
Control function
