Applied Motion RS-232 - Manual (Page 40)

40 920-0002 Rev. I
2/2013
Host Command Reference
BO - Brake Output
Compatibility: All drives
Affects:
Function of digital output
See also: AI, AO, BD, ME, MD, MO, SD, SI commands
NOTE: The digital output circuits available on Applied Motion drives are not sized for directly driving a typical
holding brake. An external relay must be wired in circuit between the digital output of the drive and the holding
brake. See the appropriate drive hardware manual for an example wiring diagram.
BLu, SV, STAC6, ST-Q/Si
Defines usage of digital output Y1 as the Brake Output, which can be used to automatically activate and
deactivate a holding brake. Output Y1 can also be configured as a general purpose output for use with other
types of output commands. There are three states that can be defined:
BO1: Output is closed (energized) when drive is enabled, and open when the drive is disabled.
BO2: Output is open (de-energized) when drive is enabled, and closed when the drive is disabled.
BO3: Output is not used as a Brake Output and can be used as a general purpose output.
ST-S, STM17, STM23, STM24-C
Defines the drive’s digital output as a Brake Output. The output of a drive can be assigned to one of five functions:
Alarm Output, Brake Output, Motion Output, Tach Output, or General Purpose Output. Each of these functions
must exclusively use the output, so only one function is allowed. There are two ways to define the function of this
output: via ST Configurator or via SCL commands. To set the output as a Brake Output, use the BO command
and one of the codes below.
BO1: Output is closed (active, low) when the drive is enabled, and open when the drives is disabled.
BO2: Output is open (inactive, high) when the drive is enabled, and closed when the drive is disabled.
BO3: Output is not used as a Brake Output and can be used for another automatic output function or as a
general purpose output.
STM24-SF/QF
Drives with Flex I/O allow a second parameter which allows the user to specify the I/O point used. Before an I/O
point can be used as a Brake Output it must first be configured as an output with the SD command.
Possible uses for the BO command on the STM24 are as follows (‘n’ denotes the I/O point to be used):
BO1n: Designated output ‘n’ is closed (active, low) when the drive is enabled and open when the drive is
disabled.
BO2n: Designated output ‘n’ is open (inactive, high) when the drive is enabled and closed when the drive is
disabled.
BO3n: Designated output ‘n’ is not used as a Brake Output and can be used for another automatic output
function or as a general purpose output.
STAC5-S, SVAC3-S
Defines usage of digital output Y2 as the Brake Output, which can be used to automatically activate and
deacti¬vate a holding brake. Output Y2 can also be configured as a Motion Output, a Tach Output, or a General
Purpose output for use with other types of output commands. There are three states that can be defined:
BO1: Output is closed (energized) when drive is enabled, and open when the drive is disabled.
BO2: Output is open (de-energized) when drive is enabled, and closed when the drive is disabled.
BO3: Output is not used as a Brake Output and can be used as a general purpose output.