GE 90-30/20/Micro manual Location Field Meaning

4

Use the table on the following page to interpret the output values:

Location	Field	Meaning
Address	Function	1 = read extra status data
Address + 1	Error Code	An error code is placed here if the function fails because any
		of the modules is not present, inappropriate, or not working.
Address + 2	First rack &	Rack and slot number (in the form RRSS in hexadecimal,
	slot	where RR is the rack number and SS is the slot number) of
		the first module from which the data will be read
Address + 3	Read data	The data read from the first module will be place here
	from first
	module
Address + 4	Second rack	Rack and slot number (in the form RRSS in hexadecimal,
	& slot	where RR is the rack number and SS is the slot number) of
		the second module from which the data will be read
Address + 5	Read data	The data read from the second module will be place here
	from second
	module
Address + (I * 2)	Ith rack & slot	Rack and slot number (in the form RRSS in hexadecimal,
		where RR is the rack number and SS is the slot number) of
		the Ith module from which the data will be read
Address + (I * 2) + 1	Read data	The data read from the Ith module will be place here
	from Ith
	module
Address + (N * 2)	Last rack &	Rack and slot number (in the form RRSS in hexadecimal,
	slot	where RR is the rack number and SS is the slot number) of
		the last module from which the data will be read
Address + (N * 2) + 1	Read data	The data read from the last module will be place here
	from last
	module
Address + (N * 2) + 2	End of list	A zero in this word indicates the end of the list of modules
	indicator

4-166 Series 90-30/20/Micro Programmable Controllers Reference Manual–September 1998 GFK-0467K