GE 90-30/20/Micro manual Ovswp

4

Example:

This example shows logic in a program block. When enabling contact OV_SWP is set, the constant sweep timer is read, the timer is increased by two milliseconds, and the new timer value is sent back to the PLC. The parameter block is in local memory at location %R3050. Because the MOVE and ADD functions require three horizontal contact positions, the example logic uses discrete internal coil %M0001 as a temporary location to hold the successful result of the first rung line. On any sweep in which OV_SWP is not set, %M0001 is turned off.

		_____			_____		_____
OV_SWP									%M0001
—— ———MOVE_————————————————— SVC_—————————— ADD_——————————————————( )—
		WORD			REQ		INT
CONST —IN			Q—%R3050	CONST —FNC			%R3051—I1	Q—%R3051
	0003	LEN		0001
		0001
		_____		%R3050—PARM			CONST —I2
					_____		0002 _____
		_____			_____
	M0001
—— ———MOVE_—————————————————SVC_						—
		WORD			REQ
CONST —IN			Q—%R3050	CONST —FNC
	0001	LEN		0001
		0001
		_____		%R3050—PARM
					_____

4-136 Series 90-30/20/Micro Programmable Controllers Reference Manual–September 1998 GFK-0467K