ABB AI635 3BHT300032R1 Channel isolation module

The status of motion for each axis can be determined by using the stop code command, SC. This can be useful when motion on an axis has stopped unexpectedly. The command SC will return a number representing the motion status. See the command reference for further information. RAM Memory Interrogation Commands For debugging the status of the program memory, array memory, or variable memory, the DMC-18x2 has several useful commands. The command, DM ?, will return the number of array elements currently available. The command, DA ?, will return the number of arrays which can be currently defined. For example, a standard DMC-1812 will have a maximum of 8000 array elements in up to 30 arrays. If an array of 100 elements is defined, the command DM ? will return the value 7900 and the command DA ? will return 29.

Operands 

In general, all operands provide information which may be useful in debugging an application program. Below is a list of operands which are particularly valuable for program debugging. To display the value of an operand, the message command may be used. For example, since the operand, _ED contains the last line of program execution, the command MG _ED will display this line number. _ED contains the last line of program execution. Useful to determine where program stopped. _DL contains the number of available labels. _UL contains the number of available variables.

To list the contents of the variable space

 use the interrogation command LV (List Variables). To list the contents of array space, use the interrogation command LA (List Arrays). To list the contents of the Program space, use the interrogation command LS (List). To list the application program labels only, use the interrogation command LL (List Labels).The following program has an error. It attempts to specify a relative movement while the X-axis is already in motion. When the program is executed, the controller stops at line 003. The user can then query the controller using the command, TC1.

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