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FX Series PLC User's Manual - Data Communication Edition
Inverter Communication
12.4.8 Step number of instruction using communication port [D8151 and D8156]
These devices store the step number of the instruction occupying the communication port.
1. Detailed contents.
D8151 or D8156 stores the step number of the inverter communication instruction using the communication
port.
D8151 stores the step number using communication port ch1.
D8156 stores the step number using communication port ch2.
2. Cautions on use
A decimal value without sign is stored as the step number in D8151 and D8156.
12.4.9 Inverter communication error code [D8152 and D8157]
These devices store an error code when a communication error is caused by an inverter communication
instruction.
1. Detailed contents
Special data registers shown below respectively store inverter communication errors, depending on each
communication port.
• D8152 stores the error code of an error in communication using communication port ch1.
• D8157 stores the error code of an error in communication using communication port ch2.
2. Error codes
The following error codes are stored.
Error
code
0
Normal end (no error)
1
Inverter did not give response.
Timeout error. This code interlocks with M8156. Sending from inverter was
2
aborted midway through.
3
An unspecified station gave response.
4
The sum of data sent back by the inverter did not match.
In writing or reading a parameter, an improper parameter number was specified.
5
At this time, the error code K6702 is set to D8067.
Because the port is being used for another communication type, it cannot be
6
used for communication with the inverter. At this time, the error code K6762 is
set to D8067.
Inverter sent the error code H0. Computer NAK error.
256
An error was included in the transfer request data from the computer beyond the
allowable number of retries.
Inverter sent the error code H1. Parity error.
257
The contents are different from the specified parity.
Inverter sent the error code H2. Sum check error.
258
The sum check code in the computer is different from the sum value calculated
from the data received by the inverter.
Inverter sent the error code H3. Protocol error.
Syntax error is included in the data received by the inverter, and the receiving of
259
data was not completed within the specified time, or CR/LF does not agree with
the parameters.
Inverter sent the error code H4. Framing error.
260
The stop bit length is different from the initial set value.
Inverter sent the error code H5. Overrun error.
261
Before receiving the completed data in the inverter, the computer sent the next
set of data.
Inverter sent the error code H6.
262
Not defined currently in inverter.
E-110
Contents of error
12.4 Details of Related Devices for FX3U and FX3UC PLCs
Inverter operation
When errors have
occurred consecutively
beyond the allowable
number of retries, inverter
is brought to an alarm
stop.
12 Related Data
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