E-110
FX Series PLC User's Manual - Data Communication Edition
Inverter Communication
12 Related Data
12.4 Details of Related Devices for FX3U and FX3UC PLCs
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
Contents of error Inverter operation
0 Normal end (no error)
1 Inverter did not give response.
2
Timeout error. This code interlocks with M8156. Sending from inverter was
aborted midway through.
3 An unspecified station gave response.
4 The sum of data sent back by the inverter did not match.
5
In writing or reading a parameter, an improper parameter number was specified.
At this time, the error code K6702 is set to D8067.
6
Because the port is being used for another communication type, it cannot be
used for communication with the inverter. At this time, the error code K6762 is
set to D8067.
256
Inverter sent the error code H0. Computer NAK error.
An error was included in the transfer request data from the computer beyond the
allowable number of retries.
When errors have
occurred consecutively
beyond the allowable
number of retries, inverter
is brought to an alarm
stop.
257
Inverter sent the error code H1. Parity error.
The contents are different from the specified parity.
258
Inverter sent the error code H2. Sum check error.
The sum check code in the computer is different from the sum value calculated
from the data received by the inverter.
259
Inverter sent the error code H3. Protocol error.
Syntax error is included in the data received by the inverter, and the receiving of
data was not completed within the specified time, or CR/LF does not agree with
the parameters.
260
Inverter sent the error code H4. Framing error.
The stop bit length is different from the initial set value.
261
Inverter sent the error code H5. Overrun error.
Before receiving the completed data in the inverter, the computer sent the next
set of data.
262
Inverter sent the error code H6.
Not defined currently in inverter.
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