GE 90-30/20/Micro manual Write Data Function #2

4

Write Data (Function #2)

The write data function writes a data value between 0 and 15 from the parameter block to one or more modules specified by a list in the parameter block. The parameter block requires (N + 4) words of reference memory, where N is the number of modules to which the data will be written.

Location	Field	Meaning
Address	Function	2 = write 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. No error code is set if the function executes but
		any of the modules does not receive the write data properly
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 to which the data will be sent
Address + 3	Write data for	This data value will be written to the first module
	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 to which the data will be sent
Address + 5	Write data for	This data value will be written to the second module
	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 to which the data will be sent
Address + (I * 2) + 1	Write data for	This data value will be written to the Ith module
	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 to which the data will be sent
Address + (N * 2) + 1	Write data for	This data value will be written to the last module
	last module
Address + (N * 2) + 2	End of list	A zero in this word indicates the end of the list of modules
	indicator

GFK-0467K Chapter 4 Series 90-30/20/Micro Instructions Set 4-167