Instruction Manual

CH.14 MAN0883-05-EN
March 4, 2010 Page 86 of 135 #1037
%S System Bit
Single-bit bit coils predefined for system use.
%SR System Register
16-bit registers predefined for system use.
%T Temporary Bit
Non-retentive single-bit registers.
14.2 Useful %S and %SR registers
Table 14.1 – 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 14.2 – %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
%SR30
NET_BAUD
Network Baud Rate (CsCAN)
(0=125KB; 1=250KB; 2=500KB; 3=1MB)
0 3