Dwyer SCD-LED - Manual (Page 2)

Parameter and ： can be set up when parameter is set as “0”.
can be set up when is not “0”.
Parameter and ： (control cycle for output 1) can be set up when parameter
is set as (heating) or (cooling) output. (control cycle for output 2)
can be set up when parameter is set as (heating) or (cooling) output.
Parameter and ： Can be set up when parameter and are set as
(heating) or (cooling) output. (The settings in and have to be
different.)
For ON/OFF Control Application:
1. Set up 2 outputs: Enter parameter and in “initial setting mode” (see “Setting up
Parameters” section for details). Set up one of the two parameters as or of control
output.
2. Set up control type: Enter parameter in “initial setting mode” (see “Setting up Parameters”
section for details) and set it up as (ON/OFF) control.
3. Set up parameters: In “regulation mode”
Parameters and ： (hysteresis for output 1) can be set up when parameter
is set as (heating) (cooling) output. (hysteresis for output 2) can be
set up when parameter is set as (heating) or (cooling) output. You can
only set up when and are set as or at the same time.
Parameter ： Can be set up when parameter and are set as control output,
and the settings in and are different, e.g. output 1 is (heating), and output
2 is (cooling).
For Manual Control Application:
1. Set up 2 outputs: Enter parameter and in “initial setting mode” (see “Setting up
Parameters” section for details). Set up one of the two parameters as or of control
output.
2. Set up control type: Enter parameter in “initial setting mode” (see “Setting up Parameters”
section for details) and set it up as (manual) control.
3. Set up parameters: In “regulation mode”
Parameter and ： (control cycle for output 1) can be set up when parameter
is set as (heating) or (cooling) output. (control cycle for output 2)
can be set up when parameter is set as (heating) or (cooling) output.
Parameter and (in “operation mode”)： can be set up when parameter
is set as (heating) or (cooling) output. can be set up when
parameter is set as (heating) or (cooling) output.
For Programmable PID Application:
1. Set up 2 outputs: Enter parameter and in “initial setting mode” (see “Setting up
Parameters” section for details). Set up one of the two parameters as or of control
output.
2. Set up control type: Enter parameter in “initial setting mode” (see “Setting up Parameters”
section for details) and set it up as (programmable) control.
3. Set up parameters: In “regulation mode”
Parameter , and .
Parameter ： can be set up when parameter is set as “0”.
Parameter and ： (control cycle for output 1) can be set up when parameter
is set as (heating) or (cooling) output. (control cycle for output 2)
can be set up when parameter is set as (heating) or (cooling) output.
Parameter and ： Can be set up when parameter and are set as
(heating) or (cooling) output. (The settings in and have to be
different.)
Parameter and (in “operation mode")：Can be set up when parameter is
set as or .
For Proportional Output Application: In this application, output 1 has to be analog output.
1. Set up output function: Enter parameter
in “initial setting mode” (see “Setting up Parameters”
section for details) and set it as (proportional) output.
2. Set up parameters: In “regulation mode”
Parameter
For Upper/Lower Limits of Control Output:
1. Set up upper limit: Enter parameter
in “regulation mode” (see “Setting up Parameters”
section for details). Range: Lower limit ~ 100%.
2. Set up lower limit: Enter parameter in “regulation mode” (see “Setting up Parameters”
section for details). Range: 0 ~ upper limit %.
For Alarm Application:
1. Set up output function (only when there is group INB): Enter parameter in “initial setting
mode” (see “Setting up Parameters” section for details) and set it as (alarm) output.
2. Set up alarm type: Enter parameter (with INB) or and (without INB) in “initial
setting mode”. See Table 2 for more details on the alarm output.
3. Set up parameters: In “operation mode”
Parameter and ： Can be set up when there is group INB.
Parameter , , and ： Can be set up when there is no group INB.
4. Set up delay alarm output: Enter parameter in “regulation mode” (unit: second). The alarm
will be enabled only when the temperature reaches the alarm output condition, and the condition
remains until the delay time is reached.
SCD main unit offers 2 groups of alarm output, each with 12 alarm modes in the initial setting mode.
When SV is higher or lower than SV, the alarm output will be enabled. See the table in the next column
for the explanations on the 12 alarm output modes.
Note: AL-H and AL-L include AL1H, AL2H and AL1L, AL2L.
SV Alarm Mode Alarm Output Operation
0 No alarm OFF
1
Alarm output is enabled when the temperature reaches upper
and lower limits: The alarm will be enabled when PV exceeds
SV + AL-H or falls below SV – A L-L. ON
OFF
AL-L SV AL-H
2
Alarm output will be enabled when the temperature reaches the
upper limit: The alarm will be enabled when PV exceeds SV +
AL-H. ON
OFF
SV AL-H
3
Alarm output will be enabled when the temperature reaches the
lower limit: The alarm will be enabled when PV falls below SV –
A L-L. ON
OFF
AL-L SV
4
Alarm output will be enabled when PV is between SV + AL-H
and SV – AL-L. ON
OFF
AL-L SV AL-H
5
Alarm output will be enabled when the temperature reaches the
absolute value of the upper and lower limits: The alarm will be
enabled when PV exceeds AL-H or falls below AL-L. ON
OFF
AL-L AL-H
6
Alarm output will be enabled when the temperature reaches the
absolute value of the upper limit: The alarm will be enabled
when PV exceeds AL-H. ON
OFF
AL-H
7
Alarm output will be enabled when the temperature reaches the
absolute value of the lower limit: The alarm will be enabled when
PV falls below AL-L. ON
OFF
AL-L
8
Upper/lower limit standby alarm: The alarm will be enabled when
PV reaches SV and further exceeds SV + AL-H or falls below
SV – AL –L. ON
OFF
AL-L AL-H SV
9 Upper limit standby alarm: The alarm will be enabled when PV
reaches SV and further exceeds SV + AL-H. ON
OFF
SV AL-H
10
Lower limit standby alarm: The alarm will be enabled when PV
reaches SV and further falls below SV – AL-L. ON
OFF
AL-L SV
11
Upper limit hysteresis alarm: The alarm will be enabled when PV
exceeds SV + AL-H. The alarm will be disabled when PV falls
below SV. ON
OFF
AL-L SV AL-H
12
Lower limit hysteresis alarm: The alarm will be enabled when PV
falls below SV – AL-L. The alarm will be disabled when PV
exceeds SV. ON
OFF
AL-L SV AL-H
Table 2
7 Setting up Communication
1. Set up communication: Enter parameter , , , , and
in “initial setting mode” (see “Setting up Parameters” section for details) and select your desired
communication settings.
2. SCD series temperature controller is able to set up or read communication settings through
SCD-LED.
8 Setting up Channel
1. Select channel: Enter parameter in “regulation mode” (see “Setting up Parameters” section
for details) and select the channel to be monitored.
2. How does it work: SCD main unit has maximum 8 channels which can be connected to 8 input
sensors at the same time. The 8 input channels belong to group INA and INB, each group with 4
input channels. INB is optional accessory; therefore if INB is not inserted in SCD, SCD will only
show 4 channels.
9 Setting up Copy Function
1. Set up the function: Enter parameter in “initial setting mode” (see “Setting up Parameters”
section for details) and select the function you desire.
2. How does it work: The copy function allows a SCD main unit to copy its parameters (including the
values set in the parameter and communication settings) to another SCD main unit through
SCD-LED. Follow the steps below:
a. Insert SCD-LED into the SCD main unit to be copied. Enter parameter
in “initial setting
mode” and select , and SCD-LED will read the parameters in the SCD main unit. Next,
you will see on the screen, indicating that the copy is successful. indicates the
copy fails. Press to return to “operation mode” and you will see the present temperature
value (PV) and set temperature value (SV).
b. Switch off SCD and withdraw SCD-LED. Insert SCD-LED into another SCD main unit. Enter
parameter
in “initial setting mode” and select . SCD-LED will write the
parameters into it. Next, you will see on the screen, indicating that the writing-in is
successful. indicates the writing-in fails. Press to return to “operation mode” and
you will see the present temperature value (PV) and set temperature value (SV).
10 Locking the Keys on Panel
1. Lock the keys: Enter parameter in “operation mode” (see “Setting up Parameters” section
for details) and select the function you desire.
2. How does it work: indicates locking all the keys on the panel. indicates that you can
only modify the set temperature value (SV), and all other functions are locked.
3. Press and at the same time to unlock the keys.
11 Analog Output & Temperature Tuning
1. Set up analog output tuning: Enter parameter and in “regulation mode” (see
“Setting up Parameters” section for details) and tune the parameter to the desired output value.
2. Temperature offset tuning: Enter parameter in “regulation mode” and tune the parameter to
the displayed temperature value.
3. How does it work:
a. Tuning analog output: For example, if you would like to have accurate 4 ~ 20mA of output, you
can set up output 0% by manual control, connect the output to ampere meter and tune
parameter
making the meter point to 4mA. Next, set up output 100% by manual control
and tune parameter making the meter point to 20mA.
b. Tuning temperature offset: This allows the displayed temperature to plus or minus 1 offset value.
12 Error Message
Error PV SV
Input sensor not connected
Internal communication error
Output error
Input error
Storage error
Channel disabled
Channel being initialized
13 How to Install
1 Remove all the terminal blocks on the panel. 2 Uncover the panel and insert SCD-LED to the
“operation interface” slot.
3 Cover up the panel. 4 Insert the terminal blocks back to their
positions.