Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 196

6 PROGRAMMING
No. Name
1
SW0074
(116)/
SW0075 Cyclic transmission
(117)/ status of each
W0076 station
(118)/
SW0077
(119)
1
SW01FC
(508)/
SW01FD
Redundant system
(509)/
status (3)
SW01FE
(510)/
SW01FF
(511)
1: Valid only when SB0047 is off. When it turns on (error), the last data are retained.
6 - 3
List of Interlock Devices (Continued)
Description
Stores the cyclic transmission status of each station (including the
host).
0: Executing cyclic transmission (including the station with the
maximum station number and smaller number as well as
reserved stations)
1: Cyclic transmission not executed
b15 b14 b13 b12
SW0074
16 15 14 13
SW0075
32 31 30 29
SW0076 48 47 46 45
SW0077
64 63 62 61
If a CPU module installed together with QJ71LP21S-25 is turned
OFF, detection of a data link error may take more time than usual.
For immediate detection of a data link error, program an interlock
using the link relay (LB) in each station's send range. (Refer to
Section 6.2.3.)
Indicates the operation status of each station's CPU (control
system/standby system).
0: The host station CPU is on the control system (including the
single CPU system) (including stations exceeding the
maximum station number and reserved stations).
1: The host system CPU is on the standby system.
b15 b14 b13 b12
SW01FC 16 15 14 13
SW01FD 32 31 30 29
SW01FE 48 47 46 45
SW01FF 64 63 62 61
to b4 b3 b2 b1 b0
to 5 4 3 2 1
to 21 20 19 18 17
to 37 36 35 34 33
to 53 52 51 50 49
Numbers 1 to 64 in the above table
indicate the station numbers.
to b4 b3 b2 b1 b0
to 5 4 3 2 1
to 21 20 19 18 17
to 37 36 35 34 33
to 53 52 51 50 49
Numbers 1 to 64 in the above table
indicate the station numbers.
[Availability column] Loop: optical loop, Bus: coaxial/twisted bus
Use permitted/prohibited
Remote
Control Normal
master
station station
Loop Bus Loop Bus Loop
: Available,
MELSEC-Q
Remote I/O
station
station
Bus Loop Bus
: Not available
6 - 3