Operation and maintenance instructions
Series PME CANopen proportional pressure
regulator
5000054187
Ver. 01
58
11.5.1.20.
2017h Enable Emergency Transmission
This object allows you to enable / disable the transmission of the emergency messages described in
the CiA 301 profile. If the transmission is disabled, no acyclic diagnostic message will be generated,
the errors will only be visible from the system LED and by reading the specific objects.
11.5.1.21.
2018h Hysteresis
This object is available only if the dead band value is greater than 0. When the absolute error of the
adjusted pressure (difference between the adjusted pressure and the target pressure) remains
below the dead band value set for a sufficient time, the regulated pressure is considered stable and
the hysteresis operating mode (A) is activated. If, on the other hand, the absolute error of the
regulated pressure remains lower than the dead band value set for a NOT sufficient time, the
regulated pressure is deemed NOT stable and the hysteresis operating mode (B) is NOT activated.
When the hysteresis operating mode is active, the regulator will not make any adjustment as long
as the absolute error of the regulated pressure remains less than the value of the sum of the dead
band and hysteresis values set (C).
When the absolute error of the regulated pressure exceeds the value of the sum of the dead band
and hysteresis values set, the hysteresis operating mode is deactivated (D) and therefore the
regulator will not carry out any regulation only if the absolute error of the regulated pressure
becomes lower than the set dead band value (E). To reactivate the hysteresis operating mode, the
absolute error of the regulated pressure must remain below the dead band value set for a sufficient
time.
This operating mode allows to reach the target pressure with sufficient precision, according to the
dead band value set, and to define a wider range, defined by the set hysteresis value, in which the
regulator will not perform any regulation.
Compatibly with the application carried out by the regulator, it is recommended to set:
o
the dead band value as small as possible, in order to obtain a good regulation precision of
the regulated pressure
o
the hysteresis value as large as possible, generally greater than the dead band value, in order
to limit the number of actuations of the regulator.
The unit of measurement of the parameter depends on objects 200Bh and 200Ch; the default unit
of measurement is the mBar.
Dead band
Dead band
Target pressure
No regulation
Pressure not stable:
Regulation
Regulation
Hysteresis
Hysteresis
Pressure stable: No
regulation
(A)
(B)
(C)
(D)
(E)
