Communication With A Control System; Mp85A Process Controller In Machine Control - HBM MP85A Operating Manual

MP85A process controller
8

Communication with a control system

8.1 MP85A process controller in machine control

Digital inputs/outputs and the CAN, PROFIBUS-DP and Ethernet digital inter-
faces are available for embedding into a machine control. Both these cases
access the same MP85A process controller device functionality (object table).
Firstly, control commands can be exchanged between the MP85A process
controller and the machine control to ensure that production runs smoothly
and secondly, status information can be exchanged and signals given to the
machine operator. The following signals are available in real time as control
inputs/outputs (e.g. machine protection):
⇒
MP85A(DP)(-S)
Process started / running
Process complete / valid
Process OK / NOK
Reset piezosensor
Result tolerance window x
Limit value ..., channel ...
Transducer test result
Error − channel x/y
MMC/SD card memory full
Heartbeat
Transfer memory full
A2392−5.0 en
digital input PLC
Description
Shows whether a measurement is underway
Shows that the process has been implemen-
ted and the result is available. The next pro-
cess may only be started once this signal has
been set
Shows the result of a process
Allows you to set a channel with piezoelectric
sensor to zero until measurement starts. This
suppresses the zero drift of this sensor
Individual windows can be specifically chec-
ked and evaluated with this message
The limit value status of this channel is output
Shows the result of a transducer test
A measurement error in the relevant channel
is present. This could be a transducer error
(e.g. in the connection), an error in the A/D
converter, the scaling, amplifier calibration
(initial calibration), TEDS error or a gross
overflow.
The MultiMediaCard/SD card is almost full,
there are less than 5 MByte free. Replace the
card with a new card or delete files
The output switches with a frequency of 1 Hz
between ON and OFF, and can be used as a
watchdog function
The internal clipboard is almost full, there are
less than 16 kByte free. The message indica-
tes a problem during saving of the measured
data, e.g. the specified PC could not be rea-
ched
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