Ecb Run Permissive - Danfoss VLT Option Panel Instruction Manual

ECB Run Permissive

General Information
With run permissive active, the drive sends a
run request and waits for a remote response
to before notifying the motor to start. The
response indicates the system is safe to
operate. Run permissive operates from the
keypad hand/off/auto select in drive or by-
pass mode. Run permissive is enabled by
programming in the drive parameters.
Prior to Enabling Run Permissive
• Complete the start-up procedure to
verify motor rotation direction in
bypass is correct and that the system
is ready in all respects for continuous
full speed operation in bypass.
• Verify that the drive is programmed for
the run permissive function. See the
drive support materials for program-
ming the run permissive function.
Operation
• A start command can be initiated from
local hand start, serial communica-
tions, or a remote auto start signal
through digital drive input terminals.
• In response to the start command, an
output request is sent from the pro-
grammable drive relay to the external
equipment (to activate a valve or
damper, for example).
• When a return run signal on the digital
input is received, the motor is started
in either drive or bypass, depending
upon which mode is active.
Run Permissive Function Setup
• See the drive manual or support
materials for programming and wiring
to the drive control terminals.
• Wire the output run request to the
drive output terminals selected, and
program the terminals for run request.
• Wire the input run command to the
drive input terminals selected, and
program the terminals for run permis-
sive.
Disable Run Permissive
• Disable run permissive through the
drive parameters and terminal pro-
gramming.
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