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Feature Configuration
ANCA Motion
DS619-0-00-0019 - Rev 0
97
10
10.1.15
Drive Bypass Mode
Description
The drive supports a feature to set its Drive Status Word (IDN 135 / S-0-0135) as if the drive were enabled. This
allows a drive to appear to be operational when in fact it is NOT. Uses for this feature include;
the staging of drive power-up on a new machine (one drive at a time commissioning, where all drives
may need to appear operational when testing the power-up sequences and evaluating their success),
debugging a problematic drive, or
the operation of a machine with a defective drive.
When the bypass mode is active and the master requests the drive to enable (via bits 13-15 of the Master Control
Word (IDN 134 / S-0-134)), the drive issues a response as if the drive has enabled (via bits 3,14,15 of the Drive
Status Word (IDN 135 / S-0-
0135)); however, the drive stays in a disabled state. The drive’s response
concerning its operating mode (bits 8,9,10 of the Drive Status Word) will also mimic the requested operating
mode (bits 8,9,11 of the Master Control Word). When in Bypass Mode all Class 1 Diagnostic Errors (C1D) are
masked out.
IDN
Description
P-0-739 / 33507
Bypass mode toggle
To put a drive into bypass mode set IDN 33507 (P-0-739) to 1. To disable bypass mode set IDN 33507 (P-0-
739) back to 0. Note that if the drive is already enabled, then the drive will remain in Bypass Mode until the drive
is disabled and then re-enabled (e.g. e-stop, then reset). This variable can be accessed through the Advanced
Parameter Access interface in ANCA MotionBench.
Software Requirements
AMD drive firmware v2.032.001 or above
Note on IO
General Purpose Digital and Analogue IO is unaffected by the drive being in Bypass Mode.
Warning:
Since an axis which is in Bypass Mode will not move, there may be a risk of the machine joints
crashing into each other.
Warning:
Vertical axes where the motor brake is NOT controlled by the drive will likely fall if the axis is
placed in Bypass Mode (for example, when the brake is controlled through a PLC). When the motor brake IS
controlled by the drive, it will remain engaged even when in Bypass Mode.