Master Station Link Special Register Check - Mitsubishi Electric NF250-SEV Programming Manual

4.4.2 Master station link special register check

The data link status of each MDU connected to the master station can be checked by the status of each bit of the link
special register SW0080 to SW0083 of the master station.
Register No.
SW0080
SW0081
SW0082
SW0083
In the table, 1 to 64 indicate station numbers.
The data link status of each station number is stored in each bit.
When the bit value is 0, the data link is normal.
When the bit value is 1, the data link has an error.
In the case that special link register SW0 in the sequencer CPU is set in the special register (SW) refresh device as
shown in the example described in "4.3.2 Master Station automatic refresh parameter setting", the contents shown in the
table above is stored in SW0080 - SW0083 in the sequencer CPU by the automatic refreshing. Therefore, the data link
status of each MDU connected to the master station can also be checked by each bit of SW0080 - SW0083 in the
sequencer CPU.
b15 b14 b13 b12
16 15 14 13
32 31 30 29
48 47 46 45
64 63 62 61
- b3 b2 b1 b0
- 4 3 2
- 20 19 18 17
- 36 35 34 33
- 52 51 50 49
16
Master station buffer
memory address
............680h
1
............681h
............682h
............683h
KGA120334-C