HBM MP85A - Page 92

Communication with a control system
92 A0293_06_E00_03 HBM: public MP85A
DescriptionPLC % control input
MP85A(DP)(‐S)
Load parameter set Loads a parameter set. If only three different parameter
sets are required, for example, you can use just two
inputs for parameter set loading, bit 0* and bit 1*; you do
not have to occupy all bits (parameter set 0 is the default
setting).
By means of signal conditioning, determine whether the
zero value is retained during loading or whether to use
the zero value from the parameter set.
Via data backup, you can define whether the device
name is retained during loading or whether to use the
device name from the parameter set.
Start/end process Use this input to start/end a process or the measure
ment. If you enter further start, stop or end conditions in
the control settings, these will apply in addition.
Store/clear statistics Saves the statistical data from the RAM in the flash
EPROM.
Switch test 1 ... 5 MP85A‐S, MP85ADP-S and MP85ADP-PN-S only:
Here, define which inputs to use for a switch test. The
inputs must be connected to a supply voltage via the
switch under test, so that its status can be recognized.
As the MP85ADP‐S only has one digital input, you can
use the four so-called virtual inputs: in this case, the
status of the virtual input is sent via a PROFIBUS
command (cyclical transmission).
The switching times are also shown during a haptic test,
if an input has been assigned.
You have two methods of process control:
1. By means of complete backup of all process data, i.e. saving curves and
results with no loss of data.
2. By means of a process-optimized sequence whereby data backup is inter
rupted on a new process, so that the next process can be started even
more quickly.
Both methods are described in the following sections; all signal diagrams are
based on positive circuit logic.