21
5.2 Useful %S and %SR registers
For additional information on system bits and registers, refer to the i3 configurator Help file.
Table 5.2– Common %S Register Definitions
Register
Description
%S1
Indicate First Scan
%S2
Network is OK
%S3
10mS timebase
%S4
100mS timebase
%S5
1 second timebase
%S6
I/O is OK
%S7
Always ON
%S8
Always OFF
%S9
Pause 'n Load soon
%S10
Pause 'n Load done
%S11
I/O being forced
%S12
Forcing is enabled
%S13
Network I/O is OK
%S16
Ethernet COM module is OK
Table 5.3 – %SR Registers – Master %SR Table
Register
Default I/O
Name
Description
Min-Max
Values
Program
(Read/Write)
Display
(Read/Write)
%SR1
USER_SCR
User Screen Number
*Excludes I3N Units
0 to 1023
Read/Write
Read/Write
%SR2
ALRM_SCR
Alarm Screen Number (0=none)
*Excludes I3N Units
0 to 1023
Read Only
Read Only
%SR3
SYS_SCR
System Screen Number
1 = Main System Menu
2= Set Network ID, Network Status,
(%SR29)
3= Set Network Baud (%SR30)
4= Set Contrast (%SR32)
5= View I3 Status
6= View I3 Diagnostics
7= View I/O Slots
8= Set Function Key Mode (%SR33)
9= Set Serial Ports (%SR34)
10= Set Time/Date (%SR44-%SR50)
11= Set Beeper (%SR183)
12= Set Screen (%SR185)
13= Removable Media
14= View Protocols
15= IP Address (ETN I/O Board)
16= Fail Safe System
17= Backup / Restore Data
18= Enable Autorun
19= Enable Autoload
20= Clone Unit -
21= Touch Calibration
0 to 24
Read/Write
Read/Write
