iSMA-B-LP Room Panel/Modbus
version 1.3
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displayed as a text (name) on 14 segment display block, together with the
HUMIDITY_SENSOR_ACTUAL_VALUE register (displayed on 8-segment display block). In
case when a particular character value is 0 (NULL), the character is not displayed. Lower
case characters are automatically changed into upper case characters. The default value is
1296648277 which corresponds
to the name “HUMI”.
5.2.5
HUMIDITY_CONFIGURATION(Register 40317, bit 0 and bit 4)
Bit
Name
0
1
0
Active
Not active Active(def)
4 ThirdPointActive No decimal Decimal(def)
Table 15 Humidity Configuration
Bit 0 of register 40317 is responsible for activation or deactivation of the visibility of humidity
sensor. If bit 0 is active, actual value of humidity sensor is visible in Main Menu.
Bit 4 of register 40316 is responsible for humidity display precision. True value of bit 4
activates precision of humidity display to the first decimal place. If bit 4 is
“false”
humidity is
displayed as integer value (without decimal place).
5.3
CO
2
_SENSOR
WARNING! All registers described below are active only when the Room Panel is equipped
with an in-built CO
2
sensor.
Default CO
2
unit is ppm and it is displayed together with CO
2
sensor value (if active)
permanently (not editable). CO
2
actual sensor value is displayed in delay of 120 sec after the
Room Panel restart or power supply connection (if bit 0 CO
2
Configuration is
“true”
). The
cause of that is the fact that the CO
2
sensor needs up to 2 minutes to warm up from the
moment of power supply connection. The CO
2
sensor achieves maximum accuracy after 10
minutes of operation. Worth mentioning is the fact that the in-built CO
2
sensor does not need
manual calibration. Calibration algorithm begins after 24 hours of continuous operation,
adjusting the sensor measurement.
5.3.1
CO
2
_SENSOR_ACTUAL_VALUE (30303)
The 30303 register stores actual value from the CO
2
sensor (including CO
2
Sensor Offset).
5.3.2
CO
2
_SENSOR_OFFSET (40306)
Register contains a value which allows for setting the correction for CO
2
sensor actual value
indication. The offset value can be positive or negative. The actual CO
2
offset value is added
to CO
2
sensor indication. Default offset is 0.
