Electronically Controlled Bypass (Ecb) Operation; Overview - Danfoss VLT FC Series Operating Instructions Manual

Electronically Controlled B...

6 Electronically Controlled Bypass (ECB) Operation

6.1.1 Overview

Information provided in this section is intended to enable
the user to connect control wiring, program functions, and
operate the ECB and its optional features.
The ECB contains a local processor located on the ECB
control card which interacts with the drive's control logic
for programmable options, remote command input, and
output status reporting. Rather than panel-mounted
operator-activated selector switches, as on the electrome-
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chanical option panel, ECB control is provided by the
drive's processor.
The ECB also contains a power supply which provides back
up for the drive's logic circuitry, so even if the drive loses
power, the control and communication functions are
maintained.
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Option Panel Operating Instructions
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Illustration 6.1 Local Control Panel (LCP)
1 LCP display
2 Menu keys
3 Menu navigation
4 Control keys
Table 6.1 Legend to Illustration 6.1
Programming and display are provided by the drive's local
control panel (LCP). See Illustration 6.1. An important
feature of the ECB is the ability to accept commands from
a building automation system (BAS) and to report
operational status in return.
Control wiring connections are made to either the drive's
control terminals (see Illustration 6.2) or terminals provided
on the ECB control card (see Illustration 6.2). Drive analog
and digital I/O terminals are multifunctional and need to
be programmed for their intended use while the terminals
on the ECB control card are dedicated for specific
functions.
Programming options for drive terminals are seen by
pressing [Main Menu] or [Quick Menu] on the LCP.
Parameter menus appear in the LCP display. The arrow
keys are used for navigating through the parameter lists.
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MG14I102 - VLT is a registered Danfoss trademark
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