Applied Motion RS-232 - Manual (Page 29)

29 920-0002 Rev. I
2/2013
Host Command Reference
AO - Alarm Output
Compatibility: All drives
Affects:
Alarm Output usage
See also: AI, BO, MO, SD, SI commands
BLu, SV, STAC6, ST-Q/Si, SVAC3-Q/S/IP, STAC5-Q/S/IP
Defines usage of digital output Y3. Normally this output is used to indicate an Alarm caused by a Drive Fault. This
output can being reconfigured as a general purpose output for use with other types of output commands. There
are three states that can be defined:
AO1: Output is closed (active, low) when a Drive Fault is present.
AO2: Output is open (inactive, high) when an Drive Fault is present.
AO3: Output is not used as an Alarm Output and can be used as a general purpose output.
ST-S, STM17, STM23, STM24-C
Defines the drive’s digital output as an Alarm 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 the ST Configurator or via SCL commands. To set the output as an Alarm Output, use
the AO command and one of the codes below. There are three Alarm Output states that can be defined with the
AO command:
AO1: Output is closed (active, low) when a Drive Fault is present.
AO2: Output is open (inactive, high) when a Drive Fault is present.
AO3: Output is not used as an Alarm 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 an Alarm Output it must first be configured as an output with the SD command.
Possible uses for the AO command on the STM24 are as follows (‘n’ denotes the I/O point to be used):
AO1n: Designated output ‘n’ is closed (active, low) when a Drive Fault is present.
AO2n: Designated output ‘n’ is open (inactive, high) when a Drive Fault is present.
AO3n: Designated output ‘n’ is not used as an Alarm Output and can be used for another automatic output
function or as a general purpose output.
NOTE: Setting the AO command to 1 or 2 overrides previous assignments of this output’s function. Similarly, if
you use the BO or MO command to set the function of the output after setting the AO command to 1 or 2, usage
of the output will be reassigned and AO will be automatically set to 3.
Command Details:
Structure AO{Parameter #1}{Parameter #2 (Flex I/O only)}
Type BUFFERED
Usage READ/WRITE
Non-Volatile YES
Register Access None