Mitsubishi MELSEC-A AJ71PT3 User Manual page 32

3. SPECIFICATIONS
(6) Faulty station detection (addresses 100 to 103)
(a) Sets 1 to the bit corresponding to the faulty remote I/O station.
1 indicates that normal communication could not be made
after retry processing had been performed the specified
number of times (address 1).
(b) In automatic return mode, the corresponding bit is reset to 0
when the faulty station is restored.
In no automatic return mode, the corresponding bit remains 1.
(c) Any faulty station is detected when Y18 is on. Data is held
when Y18 is off.
(d) Data is made up as indicated below:
•
1: Error
0: Normal
..
ee ea
" ""
",
'" '" t
Station 16 Station 15 Station 14 Station 13 Station 12 Station 11 Staion 10 Station 9 Slalion8 Station 7 Station 6 Station 5 Station 4 Station 3 Station 2 Station 1
Station 32 Stahlln 31 Station 30 Station 29 Station 28 StatiOll 27 Station 26 Station 25 Slalion 24 Station 23 Station 22 Station 21 Station 20 Station 19 Station 18 Station 17
Station 48 Station 47 Station 46 Station 45 Station 44 Station 43 Station 42 Station 41 Station 40 Station 39 Station 38 Station 37
Station 36 Station 35
Station 34 Statlon 33
Station 64 Station 63 Station 62 StatiOfl 61 Station 60 Station 59 Station
58 Station 57 Station 56 StatiOll 55 Station 54 Station 53 Station 52 Station 51 Station 50
Station 49
100
101
102
103
Address b15
(7) Communication error code (address 107)
(a) Stores the corresponding error code when X7 is switched on.
(b) Communication error codes are as follows:
I
Code Definition Cause
0
No error
1
Initial data error
The number of remote
110
stations or retries is
invalid.
2 Line error
A link cable is broken or a remote I/O station
power is off.
Communication has stopped due to a station
3 Station fault fault with communication stop mode specified
for fault detection.
(c) The communication error code is reset to 0 when Y18 or Y1Dis
switched on.
(8) Error detection code (address 108)
(a) 1 indicates that X6 has been switched on. 0 indicates normal.
(b) In automatic return mode (mode setting switch
=
0), the error
detection code remains 1 but X6 is switched off when
communication is restored.
(c) Reset to 0 when Y18 or Y1D is switched on.
•
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18lNAJ66164-A