Operation and maintenance instructions
Series PRE proportional pressure regulator
IO-Link version
5000030186
Ver. 03
34
13.2.23.
Pressure failsafe
Sets the behavior of the pressure regulator in case the cyclic data is no longer valid.
Based on the value of this parameter, the pressure regulator can maintain the last valid target
received (Maintenance) or regulate zero pressure (Discharge).
14.
Block Parameters
This function allows the master to indicate the start and end of the transmission of a block of
parameters.
In general, when you want to write a new parameter value, the master sends the new value and
the device, upon receiving the data, checks its validity. In case it is valid, it is immediately
effective.
In case of several parameters connected among each other, the change of the parameter
without changing the others connected to it, may cause a malfunction of the device.
This could for example happen when you modify the unit of measurement of the regulator,
without adjusting the other correlated parameters.
For this reason the parameter block has been introduced that consists in sending the following
commands by the master:
1
- Start of transfer with parameter block; 2 - transfer of parameters; 3 - end of block.
Only upon receipt of the
“End of block” command
, the Regulator checks the validity of all
parameters.
According to the master used, it is possible that the transfer of parameters takes place
exclusively with the parameter block or
according to the user’s choice.
To help the user changing the unit of measurement, the Regulator implements an automatic
conversion system of all the values that refer to it, regardless of the parameter block. This means
that in the event there has been a change, the Regulator is able to detect which other
parameters have not been changed and therefore need to be converted into the new unit of
measurement.
15.
Data Storage
The Data Storage is a function of the IO-Link protocol, enabling the master to store the
parameterization of the device.
Each time it is turn on, the master compares the parameterization of the device with the one
that has been saved and checks if there is a request from the device to save a new configuration.
The main situations that could occur are:
-
The device was parameterized before commissioning: at the time of connection with
the master, the device prompts it to save its parameterization.
-
The device must be replaced: when connecting with the master, the latter realizes that
the parameterization of the new device is different from the one that has been saved,
so it proceeds with a new parameterization.
Depending on the master used, there may be additional functions, for an overview of all the
functions and how to perform them refer to the manual of the IO-Link master.
