Mitsubishi Electric MELIPC MI5000 Series User Manual page 276

No. Name
SW0062 Current link scan time
SW0064 Own station connection status
SW0066 Actual link scan time (lowest 1 word)
SW0067 Actual link scan time (highest 1 word)
SW006A Own station port 2 reception error
occurrence rate (maximum)
SW006B Own station port 2 reception error
occurrence rate (current)
SW006D Master operating station number
SW006E Sub master operating station number
SW007C Port 2 cable disconnection detection
count
SW007D Port 2 received error detection count
SW007E Port 2 received data total count (lowest 1
word)
SW007F Port 2 received data total count (highest
1 word)
SW00A0 Baton pass status of each station
to
SW00A7
APPX
274
Appendix 8 List of Link Special Registers
Description
The current link scan time value during cyclic transmission is stored. (Unit: ms)
A maximum margin of error of 1 ms is included in the stored value.
<Conditions>
Enabled when 'baton pass status' of own station (SB0047) is OFF. When 'baton pass status of own
station' (SB0047) is ON (error), the data immediately before is retained.
Stores own station connection status.
■10H: Normal (Port 1 cable disconnection, Port 2 communicating)
■11H: Disconnected (Port 1 cable disconnection, Port 2 cable disconnection)
■12H: Disconnected (Port 1 cable disconnection, Port 2 line establishing)
Stores the link scan time value during cyclic transmission. (Unit: μs)
Stores the maximum value of the occurrence rate of the error frame reception of own station Port 2.
(Units: %)
If 'clear communications error count' (SB0006) is ON, then the stored occurrence rate is cleared.
Stores the current value of the occurrence rate of the error frame reception of own station Port 2.
(Units: %)
If 'clear communications error count' (SB0006) is ON, then the stored occurrence rate is cleared.
Stores the master station's station number.
• 0: No sub master function settings
<Conditions>
Enabled when 'baton pass status' of own station (SB0047) is OFF. When 'baton pass status of own
station' (SB0047) is ON (error), the data immediately before is retained.
Stores the sub master station's station number.
• 0: No sub master function settings
<Conditions>
Enabled when 'baton pass status' of own station (SB0047) is OFF. When 'baton pass status of own
station' (SB0047) is ON (error), the data immediately before is retained.
Stores the Port 2 cable disconnection detection accumulated count. If 'clear communications error
count' (SB0006) is ON, the stored count is cleared.
If the count reaches the maximum value of 65535 (FFFFH), the count returns to 0 then continues.
Stores the Port 2 error data received accumulated count. The stored count is only error data not
transmitted to all stations. If 'clear communications error count' (SB0006) is ON, the stored count is
cleared.
If the count reaches the maximum value of 65535 (FFFFH), the count stops.
The Port 2 data received accumulated count is stored. If 'clear communications error count' (SB0006)
is ON, the stored count is cleared.
If the count reaches the maximum value of 4294967295 (FFFFFFFFH), the count stops.
Stores each station baton pass status.
• 0: Baton pass normal station
• 1: Baton pass faulty station
The numbers within the following illustration indicate the station numbers. (: fixed at 0)
b15
SW00A0 16 15 14 13 12
SW00A1 32 31 30 29 28
SW00A6 112 111 110 109 108
SW00A7 - - - - -
• In the case of multiple stations that have gone from fault to normal, concurrent processing is carried
per device out for each link scan, therefore there may be several seconds variation in the time
required until "0: Baton pass normal station".
• When making a line connect or ring connection, token loss or reorganization may occur by
removing and inserting, or resetting the cable, and baton pass status may detect an error within 1
link scan.
<Conditions>
• Enabled when baton pass status of own station (SB0047) is OFF. When 'baton pass status of own
station' (SB0047) is ON (error), the data immediately before is retained.
• The status is not stored for the reserved stations and the station numbers after the maximum station
number.
b0
~ 5 4 3 2 1
~ 21 20 19 18 17
~
~ 102 101 100 98 97
~ 117 116 115 114 113