3. SPECIFICATIONS
3
−
21
MELSEC-A
(11) Station Communication Status (Address 01BC
H
to 01BF
H
/444 to 447)
Stores whether or not I/O communication is normal for each slave station.
•
If a bit is ON, I/O communication
•
If a bit is OFF, I/O communication interrupted
The buffer memory addresses and the station number corresponding to each bit are
shown in Table 3.17.
Table 3.17
Station Number Corresponding to Each Bit in the Station
Communication Status
Buffer Memory Address
Station Number Corresponding to Each Bit
(Hexadecimal)
Bit 15
Bit 14
…
Bit 1
Bit 0
01BC
H
Station 15
Station 14
…
Station 1
Station 0
01BD
H
Station 31
Station 30
…
Station 17
Station 16
01BE
H
Station 47
Station 46
…
Station 33
Station 32
01BF
H
Station 63
Station 62
…
Station 49
Station 48
(12) Station Problem Status (Address 01C4
H
to 01C7
H
/452 to 455)
Stores whether or not a communication error has occurred for each slave station.
•
If a bit is ON, problem information exists
•
If a bit is OFF, no problem information exists
Follow the procedure below to turn OFF a bit.
(a)
Read the communication error information for the station, using the buffer memory
message communication area. (For information on reading com-munication error
information, see 3.4.2 (3) Message Communication Com-mands, (4) Message
Communication Results, and (5) Message Communi-cation Data.)
(b)
When Read Communication Error Information is executed, the correspond-ing bit
automatically turns OFF.
The buffer memory addresses and the station number corresponding to each bit are
shown in Table 3.18.
Table 3.18
Station Number Corresponding to Each Bit in the Station
Problem Status
Buffer Memory Address
Station Number Corresponding to Each Bit
(Hexadecimal)
Bit 15
Bit 14
…
Bit 1
Bit 0
01C4
H
Station 15
Station 14
…
Station 1
Station 0
01C5
H
Station 31
Station 30
…
Station 17
Station 16
01C6
H
Station 47
Station 46
…
Station 33
Station 32
01C7
H
Station 63
Station 62
…
Station 49
Station 48
