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Section 6
Electronically Controlled Bypass (ECB) Operation
Figure 6-1. Local Control Panel (LCP)
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 electromechanical 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.
Programming and display are provided by the
drive’s local control panel (LCP). See Figure 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 Figure 6-2) or
terminals provided on the ECB control card (see
Figure 6-3). 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 the MAIN MENU key or QUICK MENU
key on the LCP keypad. Parameter menus appear
in the LCP display. The arrow keys are used for
navigating through the parameter lists. Terminal
functions are programmed in the 5-00 parameter
group. (See Table 6-1 for factory default parameter
settings for drives with an ECB.) Bypass functions
are programmed in the 31-00 parameter group (see
Table 6-5). See the drive’s supporting materials for
detailed programming instructions.
LCP display
Menu keys
Menu navigation
Control keys
Parameter
Parameter
name
Setting title
Setting
Function
5-01
Term 27
Mode
Input
0
Customer
Interlock
5-02
Term 29
Mode
Output
1
Auto bypass
5-10
Term 18
digital input
Start
8
Common
run/stop
5-11
Term 19
digital input
Run
Permissive
52
Run
Permissive
5-12
Term 27
digital input
External
Interlock
7
Customer
Interlock
5-31
Term 29
digital output
No Alarm
160
Auto bypass
5-40[0]
Relay 1
function
Start
Command
Active
167
Run
Permissive
5-40[0]
Relay 1 off
delay
Off Delay
0.00 s
Run
Permissive
Table 6-1. 5-00 Parameter Group Factory
Default Settings
