HBM MP85A - Page 39

Electrical connection
MP85A A0293_06_E00_03 HBM: public 39
Settings with the PME Assistant
In the PME Assistant, select the desired conversion unit in the “Transducer”
area. If you wish to use the unit stored in the TEDS instead, disable this
function in the TEDS dialog.
When the TEDS is enabled, its scaling data will be read out and converted to
the required physical unit. If the unit stored in the TEDS and the required
conversion unit are incompatible because they describe different quantities, for
example (e.g. torque transducer connected, conversion unit is “N”), an error
message is generated and scaling does not take place.
If a scaling error is reported when the TEDS is enabled, this may be because
the value range specified by the two characteristic curve points is so great or
so small that the measured values cannot be displayed with the set decimal
places. You then need to adapt the number of decimal places in the “Amplifier”
area. It may possibly help to change to a different power of ten, e.g. “N” to
“kN”.
The PME Assistant displays this information for each channel in the “TEDS”
area with the “TEDS error status”. For accurate analysis, view the data stored
in the TEDS. To do this, you need the TEDS Editor and suitable hardware, e.g.
the HBM TEDSdongle, to connect the sensors.
The data for the minimum and maximum bridge excitation voltage in the TEDS
is also checked.
If, instead of using the PME Assistant, you are parameterizing directly, e.g. by
bus command, you must use Object 2122 to set the required conversion unit
before enabling TEDS.
The available units are in the selection list provided by the PME Assistant.
Important
If several transducers are connected to an MP85A process controller in
parallel, their TEDS data cannot not be used. Error-free readout and the
totaling of individual parameters are not possible for TEDS connected in
parallel. In this case, make sure that the TEDS functionality is disabled for the
channels in question in the TEDS dialog.