Allen-Bradley MicroLogix 1200 Reference Manual page 375

Math Register
Address Data Format
S:13 word
(low byte)
S:14 word
(high byte)
These two words are used in conjunction with the MUL, DIV, FRD, and
TOD math instructions. The math register value is assessed upon
execution of the instruction and remains valid until the next MUL, DIV,
FRD, or TOD instruction is executed in the user program.
Node Address
Data Format
(1)
Address
S:15 (low byte) byte
(1) This byte can only be accessed via ladder logic. It cannot be accessed via communications (such as a Message
instruction from another device).
This address is duplicated in the Communications Status File (CSx:0.5/0
through CSx:0.5/7). See General Channel Status Block on page 3-14 for
more information.
Baud Rate
(1) Data Format
Address
S:15 (high byte) byte
(1) This byte can only be accessed via ladder logic. It cannot be accessed via communications (such as a Message
instruction from another device).
This address is duplicated in the Communications Status File (CSx:0.5/8
through CSx:0.5/15). See General Channel Status Block on page 3-14 for
more information.
Maximum Scan Time
Address Data Format
S:22 word
This word indicates the maximum observed interval between consecutive
program scans.
The controller compares each scan value to the value contained in S:22. If
a scan value is larger than the previous, the larger value is stored in S:22.
This value indicates, in 100 us increments, the time elapsed in the longest
program cycle of the controller. Resolution is -100 µs to +0 µs. For
example, the value 9 indicates that 800 to 900 us was observed as the
longest program cycle.
Range Type
-32,768 to status
+32,767
-32,768 to status
+32,767
Range Type
0 to 255 status
Range Type
0 to 255 status
Range Type
0 to 32,767 status
System Status File C-15
User Program Access
read/write
read/write
User Program Access
read only
User Program Access
read only
User Program Access
read/write
Publication 1762-RM001C-EN-P