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4-166 Series 90-30/20/Micro Programmable Controllers Reference Manual – September 1998 GFK-0467K
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 &
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 first module from which the data will be read
Address + 3 Read data
from first
module
The data read from the first module will be place here
Address + 4 Second 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 second module from which the data will be read
Address + 5 Read data
from second
module
The data read from the second module will be place here
Address + (I * 2)
I
th
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 I
th
module from which the data will be read
Address + (I * 2) + 1 Read data
from I
th
module
The data read from the I
th
module will be place here
Address + (N * 2) Last 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 last module from which the data will be read
Address + (N * 2) + 1 Read data
from last
module
The data read from the last module will be place here
Address + (N * 2) + 2 End of list
indicator
A zero in this word indicates the end of the list of modules