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MELSEC-Q
3 SPECIFICATIONS
(c) Reading communication error information
The communication error information that was read is stored.
The data set in each address is shown in Table 3.14.
Table 3.14 Setting data for reading communication error information
Buffer memory address
(hexadecimal)
Item Description
0130
H
Slave status
Indicates whether or not the slave node is set in the
parameters, and the slave node has responded, etc.
(See 1).)
0131
H
Use prohibited —
0132
H
Communication error
Stores the same error code as the higher byte of the
buffer memory address 01B1
H
.
See Section 9.2.1, “Communication error code.”
0133
H
DeviceNet general error
code
Stores a DeviceNet general error code sent from the
slave node. Valid only when the communication
error code is 35(0023
H
). (See 2).)
1
0134
H
Additional error code
Stores an additional error code sent from the slave
node.
2
0135
H
Heartbeat timeout count
Stores the number of times that detected the down
status of each slave node by DN91.
1: Refer to the manual of each slave node for the contents and handling for the actual errors.
2: Refer to the manual of each slave node for the meaning of each error code.
1) Slave status
ON/OFF of each bit notifies the down status of the slave node, as
shown in the following diagram:
Bit7
Slave node did not respond.
Slave node refused to set
the attribute data.
I/O data size set by the
parameters and the actual
size are different.
Sets as a reserved node
with a parameter.
If the corresponding bit is ON, these
errors have occurred.
Bit15 to bit 8
Used by the system
Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0