Mitsubishi Electronics Personalcomputer QSPCU Handbuch

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Mitsubishi Electronics Personalcomputer QSPCU
12.7 Special Register List
12 - 94
12
TROUBLESHOOTING
9
EMC AND LOW
VOLTAGE
DIRECTIVES
10
LOADING AND
INSTALLATION
11
MAINTENANCE AND
INSPECTION
12
TROUBLESHOOTING APPENDICES INDEX
(3) System clocks/counters
SD340
Ethernet
information
Number of
modules mounted
• Indicates the number of mounted Ethernet modules.
S (Initial)
QS
SD341 I/O number • Indicates the I/O number of mounted Ethernet module.
SD342 Network number • Indicates the network number of mounted Ethernet module.
SD343 Group number • Indicates the group number of mounted Ethernet module.
SD344 Station number • Indicates the station number of mounted Ethernet module.
Table12.23 Special register
Number Name Meaning Explanation
Set by
(When set)
Corresponding
CPU
SD412
1 second
counter
Number of
counts in 1-
second units
• Following programmable controller CPU module RUN, 1 is
added each second
• Count repeats from 0 to 32767 to -32768 to 0
S (Status
change)
QS
SD414
2n second
clock setting
2n second
clock units
• Stores value n of 2n second clock (Default is 30)
• Setting can be made between 1 to 32767
U
SD420 Scan counter
Number of
counts in each
scan
• Incremented by 1 for each scan execution after the CPU
module is set to RUN.
• Count repeats from 0 to 32767 to -32768 to 0
S (Every END)
Number Name Meaning Explanation
Set by
(When set)
Corresponding
CPU
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