How do I configure DIO1 for use in brake control?
This configures a digital output to control a brake, so that it is released once the drive is making current.
The easiest way to accomplish this is by using a comparator to look at current.
To configure the drive for this using the MMI:
Go to CONFIGURATION, ENABLE GOTO,GETFROM and set to ENABLED.
Go to CONFIGURATION, JUMPER CONNECTIONS, JUMPER 1 and set it's GET FROM to 134)ARM CUR % MON and it's GOTO to 588)COMP1 INPUT 1.
Go to APPLICATION BLOCKS, COMPARATOR 1, 590)COMP1 WINDOW SEL and set to ENABLED.
Go to APPLICATION BLOCKS, COMPARATOR 1, 589)COMP1 INPUT 2 and set to 10% (this value is the current % detection level - you set it to whatever is appropriate).
Go to APPLICATION BLOCKS, COMPARATOR 1 and set its GOTO to 296)DIGITAL POST 1.
Go to CONFIGURATION, DIGITAL OUTPUTS, DOP1 (T22) SETUP (or whichever digital output you want to use) and set it's GET FROM to 296)DIGITAL POST 1.
Go to CONFIGURATION, ENABLE GOTO,GETFROM and set to DISABLED.
Perform a PARAMETER SAVE to make the configuration permanent.
Now you take the digital output signal on T22 (or whichever digital output you used) and OR it with another set on contacts of your START relay to control the brake relay - then the brake comes on when the drive is below the threshold current, and also when you have not made START. Doing the ORing external to the drive has the advantage that the brake coming on is not dependant on power being applied to the drive!