Status Byte (hex)

Condition

00

No interrupt

D9

Watchdog timer activated

DA

Command done

DB

Application program done

F0 thru FF

User interrupt

E1 thru E8

Input interrupt

C0

Limit switch occurred

C8

Excess position error

D8

All axis motion complete

D7

H axis motion complete

D6

G axis motion complete

D5

F axis motion complete

D4

E axis motion complete

D3

W axis motion complete

D2

Z axis motion complete

D1

Y axis motion complete

D0

X axis motion complete

The Galil drivers and communication DLL’s will service the interrupt and return the StatusByte. Any host application that has been properly configured though a window message will then be notified. When using the DMCShell control, the windows message will be retrieved and the StatusByte will be returned as an argument. For example, when using the ActiveX toolkit DMCShell control with VB, the DMCShell1_DMCInterrupt() event procedure (shown below) will execute and pass the StatusByte in the argument. When an interrupt occurs, this StatusByte can then be used in a case structure as the key to notify the host application of a specific event or condition.

In the VB example below, the event procedure will display a message box every time the X-axis motion is complete, assuming the command EI1 was sent to the controller. Note: the argument is returned as 208 since the status byte is returned as an integer (i.e. D0 hex = 208 decimal).

Private Sub DMCShell1_DMCInterrupt(StatusByte As Integer)

If StatusByte = 208 Then

MsgBox "X axis complete"

End If

End Sub

Hardware Level Communications for ISA and PCI

This section of the chapter describes in detail the structures used to communicate with the DMC-1700 and DMC-1800 controllers at the register interface level. The information in this section is intended for advanced programmers with extensive knowledge of ISA and PCI bus operation.

Communications with the DMC-1700

The DMC-1700 controller provides dual FIFO (first in first out) buffers, where a primary read/write FIFO is used for the main command input and response, and a secondary FIFO is used for read-only access to the data record. The primary read and write buffers are 512 characters deep, which permits sending multiple commands at high speeds ahead of their actual command processing by the DMC-1700.

DMC-1700/1800

Chapter 4 - Software Tools and Communications • 67

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Galil Hardware Level Communications for ISA and PCI, Communications with the DMC-1700, Status Byte hex Condition
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DMC-1800, DMC-1700 specifications

The Galil DMC-1700 and DMC-1800 are advanced motion controllers widely recognized for their high performance and versatility in the automation and robotics industries. These controllers are designed to meet the demands of complex motion control applications, providing users with enhanced features and innovative technologies that optimize motion precision and efficiency.

One of the main features of the Galil DMC-1700 is its ability to handle up to 8 axes of motion control. This capability makes it suitable for a range of applications, from simple point-to-point movements to intricate trajectories in multi-axis systems. In contrast, the DMC-1800 extends this functionality, supporting up to 64 axes, making it ideal for large-scale automation environments.

Both models leverage Galil's powerful programming interface, which simplifies the development of motion control applications. The DMC-1700 and DMC-1800 controllers utilize a high-level programming language that supports advanced motion commands, including linear interpolation, circular interpolation, and complex motion profiles. This feature allows users to implement sophisticated motion sequences seamlessly.

In terms of connectivity, the Galil DMC series offers multiple communication options, including Ethernet, RS-232, and CAN bus, ensuring compatibility with various hardware and enabling easy integration into existing systems. The controllers also come equipped with digital and analog I/O ports, providing flexibility for sensor feedback and actuator control.

The advanced technology incorporated into both the DMC-1700 and DMC-1800 includes on-board PID control, which ensures precise motion control through closed-loop feedback. This results in improved stability and accuracy, particularly in high-speed applications. Additionally, the controllers offer extensive diagnostics and monitoring capabilities, allowing for real-time performance analysis and troubleshooting.

Another notable characteristic of these motion controllers is their compact design, which offers space-saving advantages while maintaining high processing power. Their robust construction and ability to operate in challenging environments make them suitable for a wide range of industrial applications, from CNC machining to assembly lines.

In conclusion, the Galil DMC-1700 and DMC-1800 motion controllers stand out due to their high-performance capabilities, advanced programming features, and flexibility in connectivity. With their ability to handle complex motion control tasks efficiently, these controllers are invaluable tools for engineers and manufacturers looking to enhance their automation processes. By integrating Galil's innovative motion control technology, industries can achieve greater precision, speed, and reliability in their operational workflows.
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