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english
address
length
(words)
description
r/W/MW
0x28
1
Alarm 2 status register
Bit 0 – Relay triggered (R)
Bit 1 – Visible alarm active (R)
Bit 2 – Alarm triggered (R)
Bit 3 – Auto reset (1)/manual reset (0) (R/W/
MW)
Bit 4 – Alarm acknowledge (R/W/MW)
Bit 5 – Alarm reset (R/W/MW)
Bit 6 – Reserved
Bit 7 – Filtered object temperature (1)/head
temperature (0) (R/W/MW)
Bit 8 – High alarm (1)/low alarm (0) (R/W/MW)
Bit 9 – Alarm enabled (1)/disabled (0)
Bits 10..15 – Reserved
R/W/MW
0x2A
1
Alarm 2 setpoint
Minimum -20°C, Maximum 1000°C
R/W
0x2C
1
Alarm 2 hysteresis
Minimum 0°C, Maximum 1000°C
R/W
* Single register writes only. New address will not take effect until next power on.
notes:
1. All temperatures are in tenths of degrees C
2. Writing to unlisted registers could cause malfunction
3. All write and mask operations are saved to non-volatile memory
4. For further information please refer to http://www.modbus.org/specs.php
5. Use address 255 to communicate with any connected sensor. Use address 0 to broadcast to
all connected sensors (no response expected)
operation
Once the sensor is in position and the appropriate power, air and cable connections are secure,
the system is ready for continuous operation by completing the following simple steps:
1. Turn on the sensor power supply
2. Turn on the connected instrumentation
3. Read, monitor or log the temperature
iMpOrTanT
Be aware of the following when using the sensor:
• If the sensor is exposed to significant changes in ambient temperature (hot to cold, or cold to
hot), allow 20 minutes for the temperature to stabilise before taking or recording measurements.
• Do not operate the sensor near large electromagnetic fields (e.g. around arc welders or induction
heaters). Electromagnetic interference can cause measurement errors.
• Wires must be connected only to the appropriate terminals.
VieWinG ThrOuGh a WindOW
The PyroMini is capable of measuring the temperature of a target through a window made of a
material that is transmissive to infrared radiation at 8-14 microns. The emissivity setting of the
sensor should be adjusted to compensate for the presence of the window. Please contact Calex
for more information on using the PyroMini with a window.
056 222 38 18
www.sentronic.com
SENTRONIC
AG
