Question:
Using an i750 servo inverter in place of the predecessor device series i700: What's in it to consider?
Answer:
The devices in the new i750 series of servo inverters have the same mechanical and electrical design as their predecessor, the i700 series.
However, there are differences to consider:
1. Plug-in terminals for STO and DI:
The digital control inputs have differences in the connectors due to their design. In comparison to i700 other plug-in terminals used, which mechanically not compatible are. The connector labeling is on the left, the signal sequence, viewed from top to bottom, is identical to i700, but the orientation is different.
span style="color:rgb(102, 102, 102);">The 3-pin connectors for STO and DI belonging to the i700 can ben thus not
be used for the i750, because this would result in incorrect contacting of the signal lines!So the plug-in terminals belonging to the i750 must be inserted and dthe wiring must be adapted accordingly to these connectors.
The following interfaces are affected:
- (X1) Basic-Safety STO, Inputs SIA, SIB
- (X2) Digital inputs DI1, DI2 for the Touch probe function
2. Support Lenze-Controller:
The i750 is exclusively by the Lenze controllers c520 and c550 from FW V01.10.00 supported.
3. Device description (EtherCAT xml):
The device descriptions of both device series differ.
If an i750 is used instead of an i700 the device description of the i700 must be exchanged for that of the i750 in the PLC application.
4. Double-axis devices on EtherCAT:
The dual-axis devices of the i750 are represented on the EtherCAT bus as two single axes with separate EtherCAT addresses.
In the predecessor i700, the double axis on the other hand is displayed as just a single EtherCAT device. The associated parameter set contains the parameters for axis A and B together, whereby the parameter indices of the two axes differ. When using an i750 double axis instead of an i700 the PLC application must be adapted accordingly.
5. Parameter transfer using Easy-Starter, PLC-Designer:
Using the export/import functions there is a way to transfer the parameters from i700 axis A or axis B to i750 axes. Some parameters may have to be reworked.
Ssee FAQ Dok-ID:
202200288.
6. Position reconstruction function:IIn contrast to the i700 servo inverter, a position reconstruction function is already implemented in the firmware of the i750 and i950.
This function can also be deactivated for the i750 if the same behavior as the predecessor i700 is desired.
This functionality offers advantages when operating the i750 under a controller from another manufacturer and position feedback using absolute encoder.
With reconstruction must be re-referenced in case of service after a device replacement.
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