![background image](http://html1.mh-extra.com/html/eaton/svch0203-spx-advanced/svch0203-spx-advanced_applications-manual_4132175090.webp)
81
SPX advanced – description of parameters
SPX ADVANCED APPLICATION MANUAL
SVCH0203—October 2017 www.eaton.com
The final brake open command: It is possible that in a
Master/Follower system the master drive opens the brake.
Also an overriding system may do this without any control
from the drive using AucControlWord1.B7. During identification
run the brake will not open.
Relay state when control unit is not powered
PreBrakeOpenCommand
OR
IN 1
NOT
IN
Identification Run
NOT
IN
IN 2
OR
IN 1
IN 2
AND
IN 1
IN 2
MasterBrakeOpenCommand
AuxControlWord 1.B7
ExtBrakeCtrl,Inv
ExtBrakeCtrl
21
22
23
Code
ID
Parameter
Notes
P1.5.1.16
447
External brake control “Ext Brake Contrl”
See detailed description about brake operation in G1.15 Brake Control.
External brake ON/OFF control
Example: OPTA2 board RO1 :
Brake function ON: Terminals 22-23 are connected
(Relay is energized).
Brake function OFF: Terminals 22-23 are open
(Relay not energized).
21
22
23
When power from control board is
removed terminals 22-23 are open.
21
22
23
Brake open command
Brake function OFF
When using the Master Follower function, the follower drive will open the
brake at the same time as the Master even if the Follower’s conditions for
brake opening have not been met.
Brake close command
Brake function ON