Juno Step Motor Control IC User Guide
71
12. Motion Monitoring &
Control
In This Chapter
Status Registers
FaultOut Signal
Event Action Processing
Host Interrupts
Trace
Settable Parameters
12.1 Status Registers
There are five bit-oriented status registers that provide a continuous report on the state of Juno and the controlled axis.
These five 16-bit registers are Event Status, Activity Status, Drive Status, Drive Fault Status, and Signal Status.
12.1.1 Event Status Register
The Event Status register is designed to record events that do not continuously change in value but rather tend to occur
once due to a specific event. As such, each bit in this register is set by Juno and cleared by the host.
The Event Status register is defined in the following table:
The Event Status register may be used to generate a host interrupt signal.
Bit
Name
Description
0
Reserved
May contain 0 or 1
.
1
Position wraparound
Set when the encoder position exceeds 2,147,483,647h (the most positive position),
and wraps to -2,147,483,647h (the most negative position), or vice versa.
2
Reserved
May contain 0 or 1
.
3
Capture received
Set when the Index position capture hardware acquires a new position value.
4
Motion error
Set when the encoder position differs from the commanded position by an amount
more than the specified maximum position error.
5-6
Reserved
May contain 0 or 1
.
7
Instruction error
Set when an instruction error occurs.
8
Disable
Set when the user disables the Juno IC by making the enable signal inactive.
9
Overtemperature fault
Set when an overtemperature fault occurs.
10
Drive Exception
Set when one of a number of drive exceptions, such as bus overvoltage or
undervoltage fault occurs.
11
Reserved
May contain 0 or 1.
12
Current foldback
Set when current foldback occurs.
13
Run time error
Set when a runtime error occurs.
14-15
Reserved
May contain 0 or 1.
