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3 SPECIFICATIONS
bit
Description
15
Controlled by another master.
14
The parameter transmitted by the master is
incorrect.
13
The response from the slave is incorrect.
12
The function requested by the master is not
supported.
11
Expansion trouble information exists.
10
The I/O byte size parameter received from the
master does not match that of the slave.
9
The slave is not ready to exchange.
8
Exchange with the slave cannot be
conducted.
7
Separated from the cyclic exchange by the
parameter setting.
6
0 (reserved)
5
The slave has entered the SYNC mode.
4
The slave has entered the FREEZE mode.
3
Watchdog monitoring is being conducted in
the slave.
2
0 (fixed)
1
Diagnostic data read request.
0
Parameter allocation request from a slave.
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(c) When the trouble code = 0200
For a slave trouble information occurrence (error code = 0200
trouble information is stored in the detailed data. The communication trouble
area configuration for this case is shown below. In addition, the expansion
communication trouble information is stored in buffer memory 2096 to 2110
for only the latest trouble information of the error code = 0200
information. For information regarding the expansion communication trouble
information refer to Section 3.4.2 (6).
Error code = slave trouble information occurrence
Detailed data 1
Master address ( 1)
Detailed data 2
Detailed data 3
1 The station address of the master station that controls the slave station in which this
trouble information occurred is stored. However, FF
information shows the exchange with the slave is failed.
2 The station address of the slave station in which this trouble information occurred is
stored.
3 Individual slave inherent ID No. from the PNO is stored. However, FF
trouble information that shows that the exchange with the slave failed.
The trouble information is shown in a 16-bit bit string, and the bits that correspond to
the respective trouble occurrences are set. A description of the error information is
given below.
Communi-
cation state
H
Detailed data length = 3
Trouble information
Slave ID ( 3)
: Exchange continues even if trouble occurs.
Processing
Multiple masters are trying to communicate with the same
slave, so recheck the parameter.
Check the parameter.
Check the slave or network status.
Check the slave specifications. Especially if global control is
supported.
Check the slave status. (refer to Section 3.4.2 (6).)
Check the slave parameter.
This trouble information will always occur at exchange start,
so it can be ignored. If this trouble occurs during exchange,
check the slave status and communication circuit.
Check the slave status and communication circuit. And
check the parameter.
This trouble information will always occur at exchange start,
so it can be ignored. Check if the parameter on the network
was changed by a class 2 master.
(Normal operation)
(Normal operation)
(Normal operation)
Check the slave statue.
This error information will always occur at exchange start, so
it can be ignored. If this error occurs during exchange, check
the slave status and communication circuit.
MELSEC-Q
), the slave
H
trouble
H
Slave address ( 2)
is stored when the trouble
H
is stored for
H
Setting
station
Master
Slave
Master
Slave
Master
Slave
Slave
Master
Master
Slave
Slave
Slave
Slave
Slave
Slave
Slave
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