MOTOROLA MVME187 Channel output module

The DMC-18x2 can operate with much faster servo update rates than default operation or standard operation. This mode is known as 'fast mode' and allows the controller to operate with the following update rates: DMC-1812 125 usec In order to run the DMC-18x2 motion controller in fast mode, fast firmware must be uploaded. This can be done through the Galil terminal software such as DMCTERM and WSDK. The fast firmware is included with the original DMC-18x2 utilities or can be found on our website. In order to set the desired update rate, use the command TM.

Application Programming

The DMC-18x2 provides a powerful programming language that allows users to customize the controller for their particular application. Programs can be downloaded into the DMC-18x2 memory freeing the host computer for other tasks. However, the host computer can send commands to the controller at any time, even while a program is being executed. Only ASCII commands can be used for application programming. In addition to standard motion commands, the DMC-18x2 provides commands that allow the DMC18x2 to make its own decisions. These commands include conditional jumps, event triggers, and subroutines. For example, the command JP#LOOP, n<10 causes a jump to the label #LOOP if the variable n is less than 10.

For greater programming flexibility

 the DMC-18x2 provides user-defined variables, arrays, and arithmetic functions. For example, with a cut-to-length operation, the length can be specified as a variable in a program which the operator can change as necessary. The following sections in this chapter discuss all aspects of creating applications programs. The program memory size is 80 characters x 1000 lines.

Common problem

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