Publication 1766-RM001A-EN-P - October 2008
554
System Status File
Sign Flag
This bit is set (1) when the result of a mathematical operation or data
handling instruction is negative. Otherwise the bit remains cleared (0).
When a STI, High-Speed Counter, Event Interrupt, or User Fault Routine
interrupts normal execution of your program, the original value of S:0/3 is
restored when execution resumes.
Controller Mode
User Application Mode
Bits 0 through 4 function as follows:
Address
Data Format
Range
Type
User Program Access
S:0/3
binary
0 or 1
status
read/write
Address
Data Format
Range
Type
User Program Access
S:1/0 to S:1/4
binary
0…1 1110
status
read only
S:1/0 to S:1/4
Mode
ID
Controller Mode
Use by MicroLogix Controller
(1)
S:1/4
S:1/3
S:1/2
S:1/1
S:1/0
1400
0
0
0
0
0
0
remote download in progress
•
0
0
0
0
1
1
remote program mode
•
0
0
0
1
1
3
remote suspend mode
(operation halted by execution of the SUS
instruction)
•
0
0
1
1
0
6
remote run mode
•
0
0
1
1
1
7
remote test continuous mode
•
0
1
0
0
0
8
remote test single scan mode
•
1
0
0
0
0
16
download in progress
•
1
0
0
0
1
17
program mode
•
1
1
0
1
1
27
suspend mode
(operation halted by execution of the SUS
instruction)
•
1
1
1
1
0
30
run mode
•
(1) Valid modes are indicated by the (
•
) symbol. N/A indicates an invalid mode for that controller.
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