Horner APG QX351 OCS HEQX351C103 User Manual
Page 70
CH. 12
MAN0892-03-EN
February 25, 2010
Page 70 of 109
# 1039
12.1.3 Resource Definitions
System Registers
System Registers (%S and %SR) are used to store general QX351 status information. This
information is used internally, and is also available to the operator via the System Menu, using the
QX351 display and keypad. The System Registers are also available for User Screens and can be
accessed by Ladder Code.
%S Registers
%S Registers are 1-bit memory locations containing system status information, which are
implemented as shown in Table 12.2:
Table 12.2- %S Registers
Register
Name
Description
%S1
FST_SCN
On during the first scan after entering RUN mode
%S2
NET_OK
On if CsCAN Network is functioning properly
%S3
T_10MS
On for 5 mS; Off for 5 mS
%S4
T_100MS
On for 50 mS; Off for 50 mS
%S5
T_SEC
On for 500 mS; Off for 500 mS
%S6
IO_OK
On if SmartStack I/O is configured properly
%S7
ALW_ON
Always On
%S8
ALW_OFF
Always Off
%S9
PAUSING_SCN
On during the last scan before Pause-N-Load
%S10
RESUMED_SCN
On during the first scan before Pause-N-Load
%S11
IO_FORCED
On if one or more I/O points are currently being forced
%S12
IO_FORCING
On if I/O forcing is enabled
%S13
NET_IO_OK
On if Network I/O (SmartStix) is functioning properly
%S16
Ethernet COM module is OK
%SR Registers
%SR Registers are 16-bit memory locations, containing system status information, implemented as
shown in Table 12.3.
Note: Where 2 %SRs are combined to make a 32-bit value, the lower numbered %SR is the low word,
while the higher numbered %SR is the high word.
Table 12.3- %SR Registers
Register
Name
Description
Min Val
Max Val
%SR1
USER_SCR
Current User Screen Number
1
1023
%SR2
ALRM_SCR
Current Alarm Screen Number (0=none)
0
1023
%SR3
SYS_SCR
Current System Screen Number (0=none)
0
14
%SR4
SELF_TEST
Bit-Mapped Self-Test Result
0
65535
%SR5
CS_MODE
Control Station Mode (0=Idle, 1=Do I/O, 2=Run)
0
2
%SR6
SCAN_RATE
Average Scan Rate ( / 10)
-
1000
%SR7
MIN_RATE
Minimum Scan Rate ( / 10)
-
1000
%SR8
MAX_RATE
Maximum Scan Rate ( / 10)
-
1000
%SR9-10
EDIT_BUF
Data Field Edit Buffer
0
2
32
-1
%SR11-12
LADDER_SIZE
Ladder Code Size
2
256K
%SR 13-16
Reserved
-
-
-
%SR17-18
IO_SIZE
I/O Configuration Table Size
16
127K
%SR19-20
NET_SIZE
Network Configuration Table Size
34
1K
%SR21-22
SD_SIZE
Security Data Table Size
-
-
%SR23
LADDER_CRC
Ladder Code CRC
0
65535
%SR 24-25
Reserved
-
-
-
%SR26
IO_CRC
I/O Configuration Table CRC
0
65535
%SR27
NET_CRC
Network Configuration Table CRC
0
65535
%SR28
SD_CRC
Security Data Table CRC
0
65535
%SR29
NET_ID
This Station’s Primary Network ID (CsCAN)
1
253