Operating Instructions

Migration Guide SED2 to BT300 Variable Frequency Drives
Document Number 125-1005
January 12, 2015
Page 10 Siemens Industry, Inc.
Auto Bypass with
Interlock on VFD Fault
Description
Interlock and Auto Bypass features are both active. Auto Bypass now becomes auto
bypass on a VFD fault only (bypass is initiated by the SED2 Fault and this digital
output must always be programmed to VFD fault).
• All set-up is the same as with Interlock (see the Interlock section in Application
Feature Setup).
• Hand bypass is now initiated by SED2 Fault.
• The Programmable Output is still used to initiate the proofing sequence.
Settings
DIP Switch
Interlock and Auto Bypass requires that Controller board DIP Switches 2 and 3 are set
ON.
NOTE: During operation, the Auto Bypass Enabled indicator is on steady. Also, the
Interlock Start Logic Enabled indicator is on steady.
Figure 7. DIP Switch Setting.
Keypad
For proper Auto Bypass with Interlock operation, set the following BT300 parameters
from the keypad:
Navigate:
Main Menu > Parameters (M3) > I/O Config (3.5) > Digital Outputs (3.5.3) > Slot B
Basic (3.5.3.2) > RO1 Function (3.5.3.2.1) > Edit > and then select StartSignal.
NET Tool
From the Siemens NET Tool:
Change RO 1 Function to be StartSignal.