5 Electromechanical Bypass (EMB2) Operation
5.1.1 Typical Control Connections for Common HVAC Applications
Drive Terminal
Parameter Number
Parameter Name
Value Number
Value Name
Function
27
500
Digital I/O Mode
0
PNP
External Interlock
27
501
Term 27 mode
0
Input
External Interlock
29
502
Term 29 Mode
1
Output
Auto Bypass
18
510
Term 18 digital input
8
Start
Common run/stop
19
511
Term 19 digital input
52
Run Permissive
Run Permissive
27
512
Term 27 digital input
7
External Interlock
External Interlock
29
531
Term 29 digital output
160
No Alarm
Auto Bypass
01 & 02
540 [0]
Relay 1 function
167
Start Command Active
Run Permissive
01 & 02
540 [0]
Relay 1 off delay
0.00 seconds
Off Delay
Run Permissive
Table 5.1 EMB2 Default Parameter Settings for Common HVAC Applications
If the drive is reinitialized, be sure that these settings are maintained or reset for proper bypass.
Name
Function
Drive Terminals
EMB2 X59
EMB2 X55
Remote Drive Start (with common start/stop)
Input Command
3, 4
Remote Drive Start (without common start/stop)
Input Command
13, 18
Motor Running on Drive
Output Status
04, 05, 06
Run Request (for run permissive)
Output Command
11, 12
Run Enable (for run permissive)
Input Command
1, 2
Safety Stop
Input Command
5, 6
Drive Fault
Output Status
5, 6, 7
Fire Mode
Input Command
7, 8
Drive Mode
Output Status
1, 2
Bypass Mode
Output Status
3, 4
Fire Mode
Output Status
9, 10
Table 5.2 Common Functions for Controlling Motor using Bypass and Typical Terminal Connections.
Commands enable drive functions. Status reports describe conditions, but do not enable a function.
Electromechanical Bypass (E...
Vertical Bypass/Non Bypass Panel
MG.13.A1.22 - VLT
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