Interface Description Hsp (Hydac Simple Protocol); Start-Up; Fit Table; Reference Cycle - HYDAC ELECTRONIC HYDACLAB HLB 1400 Bedienungsanleitung

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HYDACLAB 1400
5.5

Interface Description HSP (HYDAC Simple Protocol)

The device has a serial interface. The user can communicate with the device via this interface.
Data transmission at a baud rate of 9600 is possible via PIN 5 using the HSP protocol. The device
supports the following functions:
HSP
Sensor Id
Command 000 is supported.
Device status
Commands 010 and 011 are supported.
Sensor Information
Commands 020 and 021 are supported.
Measured values
Commands 030, 031 and 032 are supported.
Read out Log
Commands 060, 061 , 070, 071 and 072 are supported.
Help
Command 999 is supported.
Detailed information can be found in the HSP protocol manual "HSP Specification".
6

Start-up

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HYDACLAB starts its data storage as soon as it is connected to a voltage supply and the fluid
temperature exceeds its activating temperature of 40°C (factory settings) for the first time. The output
signals for temperature and saturation are available immediately after sensor start-up. The signal
for relative change in the DC and relative change in the conductivity is displayed after the
homogenisation phase is completed. The conductivity and the dielectric change is indicated as a
percentage deviation from the reference value determined during the referencing phase.
6.1

Fit Table

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HYDACLAB continuously writes to a fit table in which the respectively defined conductivity and
dielectric values for each temperature are stored. By means of this table, the measured values can
be linked to a reference temperature. The fit table will be frozen on completion of the homogenisation
phase. The frozen fit table provides a reference framework for the calculation of the conductivity and
dielectric change. On delivery of the HYDACLAB
the activation temperature has been exceeded.
6.2

Reference Cycle

During the referencing cycle HYDACLAB
adapts to the conditions of the relevant application. It is therefore essential that typical operating
conditions, particularly all relevant operating temperature ranges, are run through during the
reference phase. The end of the reference cycle is achieved when 50% of the working temperature
is recorded and can be recognised from the LED as well as from the signal level of the status signal
(see chapter ).
5.2
Version 2019/06/26
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the table is empty. The table is not written to until
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records the characteristics of the respective oil and
HYDAC ELECTRONIC GMBH
Page 12
Part No. 669922