Sentera Controls HPD, Mounting And Operating Instruction

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MIW-HPD-X-EN-001 - 19 / 03 / 2020 9 - 10
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Blinking green RX and TX LEDs indicate that the unit has detected a Modbus
network (
Fig. 8 ). If they do not blink, check the connections.
Fig. 7 Operating indication Fig. 8 Modbus communication indication
ON/OFF LED
TX - transmitting
RX - receiving
ATTENTION
The status of the LEDs can be checked only when the unit is powered. Take the
relevant safety measures!
OPERATING INSTRUCTIONS
NOTE
For detailed information and settings, refer to the product Modbus register map,
which is attached to the article code on our website.
Calibration procedure:
1. Sensor module 1:
1.1 Disconnect the nozzles and make sure they are not clogged.
1.2 There are two options for starting the calibration process:
■
Either write “1” in holding register 70 or press tact switch SW1 for about 5
seconds until the blue LED3 on the printed circuit board blinks twice and release
it (see
Fig. 9 Sensor calibration and Modbus register reset tact switch and
indication ).
1.3
After the calibration is done, the blue LED3 will blink twice once again to
indicate that the calibration procedure has finished.
2. Sensor module 2:
2.1 Disconnect the nozzles and make sure they are not clogged.
2.2 There are two options for starting the calibration process:
■
Either write “1” in holding register 90 or press tact switch SW2 for about 5
seconds until the blue LED4 on the printed circuit board blinks twice and release
it (see
Fig. 9 Sensor calibration and Modbus register reset tact switch and
indication ).
2.3 After the calibration is done, the blue LED4 will blink twice once again to
indicate that the calibration procedure has finished.
3. .
ATTENTION
Make sure that the nozzles are disconnected and unobstructed.
Reset of Modbus holding registers procedure:
1. There are two options for starting the Modbus reset process:
■
Write ‘1’ in holding register 10 or press tact SW1 until the blue LED3 on the
printed circuit board blinks two times and do not release the switch until LED3
blinks again three times.
2.
All Modbus registers, except the communication related registers 1—9, are reset
to their default values (factory pre-set).
DUAL DIFFERENTIAL
PRESSURE TRANSMITTER
HPD