5.4.1
Factory Setting
All parameters are reset to the default value when activating the factory setting. For fieldbus operation,
this means that the fieldbus control mode is exited, and that all fieldbus parameters are reset to the
default values. New parameter values can then be assigned to the inverter, which can now be switched
back to
P841 Control Mode = Fieldbus.
Inverter parameters can be adjusted manually with the hand-held keypad, or with MC_SHELL, or via
the fieldbus system in the form of a parameter download. The following procedure must be followed
when the factory setting is activated via the fieldbus and parameters then adjusted:
1) Parameter to be written,
P830 Factory Setting = Yes (fieldbus index 1203).
2) Parameter
P830 Factory Setting, to be repeatedly read, until factory setting has been completely
activated and
P830 Factory Setting = No is returned.
3) All drive parameters that differ from the factory setting to be written
(either by means of single write services, or as a download parameter block)
Inverter parameters can be adjusted manually with the hand-held keypad, or with MC_SHELL, or via
the fieldbus system using the write service specific to that fieldbus.
IMPORTANT
The inverter must be enabled on the terminal side in order for it to be controlled via the fieldbus
system. This means that the drive will be enabled subject to certain preconditions being met after the
factory setting has been activated. Before the factory setting is activated, therefore, care must be
taken that the digital input terminal signals following activation of the factory setting do not enable
the inverter.
5.4.2
Saving to EEPROM
During parameter adjustment, it should be borne in mind that all parameters written via the fieldbus
system are normally stored in the inverter. The MOVITRAC
®
31.. inverter uses an EEPROM as resident
storage, and the life of this is limited by the number of save operations. Therefore, if frequent
parameter changes are made, the save function should be deactivated using the parameter
P801 Save = Off
Once this has been deactivated, parameters written subsequently will not be stored in resident
memory, i.e. they will only be effective until the equipment is switched off or reset.
The following procedure must be followed in fieldbus mode if the inverter has parameter set cyclically
with the fieldbus system write service:
1) Activate factory setting.
2) Set inverter parameters in such a way that the basic function of the application is guaranteed.
All parameters are stored memory-resident, and become effective after switching the inverter off
and then on again, or after a reset.
3) Deactivate the save to EEPROM function with P801 Save = Off.
Any parameters subsequently modified will not be stored in resident memory.
4) Adjust parameters cyclically.
If the inverter is now switched off and on again or reset using the Reset function, the settings given
in point 2) will become effective again. However, the
P801 Save parameter remains switched off so
that your application can immediately be controlled again at point 4).
5
Setting Inverter Parameters
MOVITRAC
®
31.. Fieldbus Unit Profile
49
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