4.3 CPU Unit Specifications
System Register Specifications
4-15
Details
This section gives details on the system registers.
System Service Registers
The data in these registers give the execution status and specifications of the programs. The System Ser-
vice Registers are reset to zero when the system is started.
Shared by All Drawings
Register Address Name Remarks
SW00000
SB000000 Reserved for system. −
SB000001 High-speed Scan
ON for only the first scan after high-speed scan is
started.
SB000002 Reserved for system. −
SB000003 Low-speed Scan
ON for only the first scan after low-speed scan is
started.
SB000004 Always ON Always ON (set to 1).
SB000005 High-speed Scan 2
Only ON for one scan when the high-speed scan
starts after the CPU Unit is changed to RUN
Mode.
SB000006 Low-speed Scan 2
Only ON for one scan when the low-speed scan
starts after the CPU Unit is changed to RUN
Mode.
SB000007 High-speed Scan in Progress 1: High-speed scan in progress
SB000008
MP2000 Option Service Exe-
cuting
ON (set to 1) during service scan for the MP2000-
series Optional Modules.
SB000009 to
SB00000F
Reserved for system. −
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