OPERATION MANUAL
Technical changes reserved
0141 0315-150 29.06.2016
Controller N321
2.1. Level 1 - Setpoint Adjustment
In this level only the Setpoint (SP) parameter is available, alternating the name with its respective value. Adjust the desired
temperature for setpoint by clicking on the
and
keys.
Level
Function
SP (Set Point)
Temperature adjustment for control OUTPUT 1. SP value is limited to the values programmed in SPL and SPk in the
programming level (Parameter configuration, level 2).
2.2. Level 2 - Configuration - Parameters configuration Level
Contains the configuration parameters to be defined by the user, according to the system’s requirements.
Use
and
keys to set the value. The display alternates the parameter name and respective value.
Level
Function
Unt
Temperature Unit: Selects display indication for degrees Celsius or Fahrenheit.
0
- Temperature in degrees Celsius
1
- Temperature in degrees Fahrenheit
typ
Input Type: Selects the input sensor type to be connected to the controller. Available only for thermocouple models, al-
lowing selection of types J, K and T.
0
- Thermocouple type J
1
- Thermocouple type K
2
- Thermocouple type T
ofs
Sensor Offset: Offset value to be added to the measured temperature to compensate sensor error.
spl
SP Low Limit: Lower range for SP.
spl
must be programmed with a lower value than
SPH
.
SPH
SP High Limit: Upper range for SP.
SPH
must be greater than
SPL
.
Hy1
OUTPUT 1 Hysteresis: Defines the differential range between the temperature value at which the
OUTPUT 1 is turned on and the value at which it is turned off. (In degrees).
Ac1
Control action for OUTPUT 1:
0
- Reverse: For heating applications. Outputs turn on when temperature is lower than SP.
1
- Direct: For cooling applications. Output turns on when temperature is above SP.
of1
(Off time)
Off time: Defines the minimum off time for control OUTPUT 1. Once OUTPUT 1 is turned off, it remains so for at least the
time programmed in oft. For thermocouple inputs this parameter is not available. This parameter is intended for refrigera-
tion systems where longer compressor life is desired. For heating systems, program
of1
to zero. Value in seconds, 0 to
999 s.
on1
(On time)
On time: Defines the minimum on time for control OUTPUT 1. Once turned on, OUTPUT 1 remains so for at least
the time programmed in
on1
. For thermocouple inputs this parameter is not available. This parameter is intended for
refrigeration systems where increased compressor life is desired. For heating systems, program
on1
to zero. Value in
seconds, 0 to 999 s.
dl1
(Delay 1) Delay time to start control: Upon power-on, control OUTPUT 1 is kept off until the time programmed in
dl1
is elapsed. Its usage is intended to prevent multiple compressors to start simultaneouly after the
turn-on of a system with several controllers. Value in seconds, 0 to 250 s.
Add
(Adress)
Adress: Controllers with the optional RS485 Modbus RTU communication interface have the Add parameter at the
Configuration level. Set a unique Modbus address for each equipment connected to the network. Address range is from 1
to 247.
B+B Thermo-Technik GmbH | Heinrich-Hertz-Str. 4 | D-78166 Donaueschingen
Fon +49 771 83160 | Fax +49 771 831650 | [email protected] | bb-sensors.com
6 / 9
