Applied Motion RS-232 - Manual (Page 200)

200 920-0002 Rev. I
2/2013
Host Command Reference
STAC5-S, SVAC3-S
Defines the X3 input as an Enable Input. If you want to use the X3 input as an Enable input you can define it as
such in two ways, with the ST Configurator software, or with the SI command. SI takes no effect if the drive is set
in Command Mode (CM) 13, 14, 17 or 18, because these modes use the X3 input as a speed change input and
take precedence over the SI command. Also, setting the AI command after setting the SI command reassigns
the X3 input to Alarm Reset usage and turns off any drive enable usage (SI3). In other words, the AI and SI
com¬mands, as well as Command Modes (CM) 13, 14, 17 and 18 each assign a usage to the X3 input. Each of
these must exclusively use the X3 input.
There are three Enable input states that can be defined with the SI command:
SI1: Drive is enabled when the X3 input is open (inactive, high).
SI2: Drive is enabled when the X3 input is closed (active, low).
SI3: The X3 input is not used for Enable and can be used as a general purpose input. SI will be automatically
set to 3 if CM is set to 13, 14, 17, or 18, or if AI is set to 1 or 2 after the SI command is set.
Command Details:
Structure SI{Parameter #1} {Parameter #2 (Flex I/O only)}
Type BUFFERED
Usage READ/WRITE
Non-Volatile Yes
Register Access None
Parameter Details:
Parameter #1 Input Usage
- units integer code
- range 1 - 3 or 1 - 5 (see above)
Parameter #2 (Flex I/O only) I/O Point (if applicable, see note below)
- units Integer Code
- range 1 or 3 (See STM24 Hardware Manual for details)
NOTES:
• For drives with Flex I/O, the SD command must be executed to set an I/O point as an input or output before it
can have a dedicated function assigned to it.
• Parameter #2 only applies to drives equipped with Flex I/O. This includes the STM24SFand STM24QF.
Parameter #2 is not defined for drives equipped with standard I/O.
Examples:
All drives with standard I/O:
Command Drive sends Notes
SI1 - Cause drive to be enabled when X3 / EN input is open
SI SI=1
Drives with Flex I/O:
Command Drive sends Notes
SD3I - Configures I/O 3 as input (see SD command for details)
SI13 - Cause drive to be enabled when Input 3 is open
SI SI=13