Mitsubishi Electric A1SJ71DN91 User Manual page 42

3. SPECIFICATIONS
(7) Error Information (Address 01B1
Stores the detected communication error code.
(a) The error information is stored in the error information area when an error occurs.
The error set signal (Xn3) turns ON.
(b) The data in the "Error information" area is cleared by turning ON the error reset
request (Y(n+1)3) through the sequence program.
(c) The error information is stored as the error code in the upper byte and the station
number in the lower byte, as described below.
1) Upper Byte
This byte stores the error codes.
See 8.3.1 Communication Error Codes for details.
2) Lower Byte
This byte stores the station number (MAC ID) of the station where the error
occurred.
FE , FF (254, 255) : Host station (DN91)
H H
0 to 3F (0 to 63)
H H
REMARK
If an error occurs in multiple stations, the error for the station with the lowest station number
(MAC ID) is stored.
(8) Bus Error Counter (Address 01B2
Stores the number of times the invalid frame count of CAN chip (DeviceNet
communication chip) exceeded 96. Any increase in the value indicates the instability of
communication.
(9) Bus-off Counter (Address 01B3
Stores the number of times DN91moved into the state of Bus-off. Any increase in the
value indicates the instability of communication.
(10) Station Configuration Status (Address 01B4
Stores the parameter setting status for each slave station.
•
If a bit is ON, the parameters are set.
•
If a bit is OFF, the parameters are not set.
The buffer memory addresses and the station number corresponding to each bit are
shown in Table 3.16.
Table 3.16 Station Number Corresponding to Each Bit in the Station
Configuration Status
Buffer Memory Address
(Hexadecimal)
01B4
H
01B5
H
01B6
H
01B7
H
/433)
H
: Station number (MAC ID) of the slave station
where the error occurred
/434)
H
/435)
H
to 01B7
H
Station Number Corresponding to Each Bit
Bit 15 Bit 14
Station 15 Station 14
Station 31 Station 30
Station 47 Station 46
Station 63 Station 62
−
3 20
MELSEC-A
/436 to 439)
H
... Bit 1
... Station 1
... Station 17
... Station 33
... Station 49
Bit 0
Station 0
Station 16
Station 32
Station 48