Computer Hardware User Manual

49
uses, such as transmission counters, flags, and control bits, and words AR 00
through AR 07 and AR 23 through AR 27 cannot be used for any other purpose.
Words and bits from AR 08 to AR 17 are available as work words and work bits if
not used for the following assigned purposes.
Word Use
AR 08 to AR 15 SYSMAC LINK Units
AR 16, AR 17 SYSMAC LINK and SYSMAC NET Link Units
The AR area retains status during power interruptions, when switching from
MONITOR or RUN mode to PROGRAM mode, or when PC operation is
stopped. Bit allocations are shown in the following table and described in the fol-
lowing pages in order of bit number.
AR Area Flags and Control Bits
Word(s) Bit(s) Function
00 00 to 09 Error Flags for Special I/O Units 0 to 9 and PC Link Units 0 to 9
(The function of these flags is duplicated in SR 28200 through SR 28209.)
10 Error Flag for operating level 1 of SYSMAC LINK or SYSMAC NET Link System
11 Error Flag for operating level 0 of SYSMAC LINK or SYSMAC NET Link System
12 Host Computer to Rack-mounting Host Link Unit Level 1 Error Flag
13 Host Computer to Rack-mounting Host Link Unit Level 0 Error Flag
14 Remote I/O Master Unit 1 Error Flag
15 Remote I/O Master Unit 0 Error Flag
01 00 to 09 Restart Bits for Special I/O Units 0 to 9 and PC Link Units 0 to 9
(The operation of these bits is duplicated in SR 28100 through SR 28109.)
10 Restart Bit for operating level 1 of SYSMAC LINK or SYSMAC NET Link System
11 Restart Bit for operating level 0 of SYSMAC LINK or SYSMAC NET Link System
12, 13 Not used.
14 Remote I/O Master Unit 1 Restart Bit.
15 Remote I/O Master Unit 0 Restart Bit.
02 00 to 04 Slave Rack Error Flags (#0 to #4)
05 to 14 Group-2 Error Flags (Bits 05 through 14 correspond to Units 0 to 9.)
15 Group-2 Error Flag
03 00 to 15 Error Flags for Optical I/O Units and I/O Terminals 0 to 7
04 00 to 15 Error Flags for Optical I/O Units and I/O Terminals 8 to 15
05 00 to 15 Error Flags for Optical I/O Units and I/O Terminals 16 to 23
06 00 to 15 Error Flags for Optical I/O Units and I/O Terminals 24 to 31
07
00 to 03 Data Link setting for operating level 0 of SYSMAC LINK System
04 to 07 Data Link setting for operating level 1 of SYSMAC LINK System
08 TERMINAL Mode Input Cancel Bit
09 Expansion TERMINAL Mode ON/OFF Bit
10 to 11 Not used.
12 Same as status of pin 6 on CPU Unit’s DIP switch
13 Error History Overwrite Bit
14 Error History Reset Bit
15 Error History Enable Bit
08 to 11 00 to 15 Active Node Flags for SYSMAC LINK System nodes of operating level 0
12 to 15 00 to 15 Active Node Flags for SYSMAC LINK System nodes of operating level 1
16 00 to 15 SYSMAC LINK/SYSMAC NET Link System operating level 0 service time per cycle
17 00 to 15 SYSMAC LINK/SYSMAC NET Link System operating level 1 service time per cycle
18
00 to 07 Seconds: 00 to 59
08 to 15 Minutes: 00 to 59
AR (Auxiliary Relay) Area Section 3-5