GE PACSystems RX7i

Chapter 6. Service Request Function
GFK-2950C February 2018 341
SVC_REQ 57 Example
The following LD logic writes ten continuous bytes to nonvolatile storage, ranging from %G1 through
%G80. The value applied to IN1, 56, determines byte mode.
The parameter block starts at %R00050. The response words are returned to %R00056—%R00059.
Parameter Block for SVC_REQ 57 Example
Address + Offset
Address
Input Value
Definition
Address+0
%R00050
56
Data type = %G (byte mode)
Address+1
%R00051
0
Address written from, low word
Address+2
%R00052
0
Address written from, high word
Address+3
%R00053
10
Length = 10 bytes
Address+4
%R00054
0
Storage disabled conditions are enforced
Address+5
%R00055
0
Reserved, must be set to 0
Address+6
%R00056
NA
Response status. The low byte contains the major error
code; the high byte contains the minor error code.
Address+7
%R00057
NA
Count of items written: Words, bytes or bits.
Address+8
%R00058
NA
The number of bytes available in nonvolatile storage.
Address+9
%R00059
NA
Address+10
%R00060
NA
Reserved
Address+11
%R00061
NA
Reserved