Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE - Manual (Page 90)

6-34 PARAMETER AND VARIABLE DESCRIPTIONS
1557-UM050F-EN-P – June 2013
Synchronous Transfer Time [Sync xfer time]
Linear number:
230
Minimum value: 0.1 min.
Maximum value: 57.0 min.
Default value: 1.0 min.
This parameter specifies the time allowed for completion of a synchronous transfer. If transfer is not complete
within this time, the drive will stop with a “sync transfer failed” fault. If the “sync transfer failed” fault is disabled,
the transfer request will be cancelled and the drive will continue to run at the commanded spe
ed. A “sync
transfer failed” warning will be displayed.
This parameter was added in Rev 4.60/5.10.
External Fault Input [Ext fault input]
Linear number:
232
Minimum value: 0000 Hex
Maximum value: FFFF Hex
Default value: 0000 Hex
This parameter specifies the external fault inputs. It is bit encoded as shown below:
xxx1H - External Fault 1
xxx2H - External Fault 2
xxx4H - External Fault 3
xxx8H - External Fault 4
xx1xH - External Fault 5
xx2xH - External Fault 6
xx4xH - External Fault 7
xx8xH - External Fault 8
x1xxH - External Fault 9
x2xxH - External Fault 10
x4xxH - External Fault 11
x8xxH - External Fault 12
1xxxH - External Fault 13
2xxxH - External Fault 14
4xxxH - External Fault 15
8xxxH - External Fault 16
The presence of an external fault is indicated by setting the corresponding bit. The absence of an external
fault is indicated by clearing the corresponding bit.
This parameter is normally sent from an external device via RI/O. The first eight external faults are OR’ed with
the eight hardware fault inputs (i.e. the maximum number of external faults is 16, not 24). If any of the first
eight external faults are sent from an external device via RI/O, the corresponding hardware fault input must not
be connected.
Tachometer Type [Tach type]
Linear number:
233
Minimum value: 1
Maximum value: 2 or 3 (FRN5.20 only)
Default value: 2
This parameter specifies the type of tachometer or encoder installed.
1
single output (non-directional)
2 quadrature outputs (directional)
3 absolute encoder (for synchronous machines)
Warning: If tachometer type is set to 1, the drive cannot determine the direction of rotation when the motor is
coasting. If the direction of rotation is not the same as the commanded direction, a flying start will not be
successful.