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102
Description of parameters
7) Error code
If any error is found in the data received by the converter, its error definition is sent back to the computer together with
the NAK code.
(5) Response time
[Formula for data transmission time]
Communication specifications Data check time
Error
Code
Error Item Error Description Converter Operation
H0 Computer NAK error
The number of errors consecutively detected in communication
request data from the computer is greater than permissible
number of retries.
If errors occur consecutively
and exceed the number of the
permissible number of retries
(Pr. 121), the converter
outputs the alarm (LF).
H1 Parity error The parity check result does not match the specified parity.
H2 Sum check error
The sum check code in the computer does not match that of the
data received by the converter.
H3 Protocol error
The data received by the converter has a grammatical mistake.
Or, data receive is not completed within the predetermined time.
CR or LF is not as set in the parameter.
H4 Framing error The stop bit length differs from the initial setting.
H5 Overrun error
New data has been sent by the computer before the converter
completes receiving the preceding data.
H6
H7 Character error
The character received is invalid (other than 0 to 9, A to F, control
code).
Does not accept the received
data.
H8
H9
HA Mode error
Parameter write was attempted in other than the computer link
operation mode, when the operation command source is not
present, or when parameter write is disabled.
Does not accept the received
data.
HB Instruction code error The specified instruction code does not exist.
HC Data range error Invalid data has been specified for parameter write, etc.
HD
HE
HF
1
Number of data characters
(Refer to page 99)
Communication
(Total number of bits)
(Refer to the following.)
= data transmission time (s)
Communication speed (bps)
Name Number of Bits Item Check Time
Stop bit length
1 bit
2 bits
Various monitors < 12ms
Data length
7 bits
8 bits
Parameter read/write, < 30ms
Parity check
Present 1 bit Parameter clear / all clear < 5s
Absent 0 Reset command No answer
In addition to the above, 1 start bit is necessary.
Minimum number of total bits.................9 bits
Maximum number of total bits.................12 bits
10ms or more necessary
Data sending time (refer to the following formula)
Converter data processing time
Data sending time (refer to the following formula)
Waiting time
(setting 10ms)
Data check time
(depends on the
instruction code (see the
following table))
Time
ComputerConverter
ConverterComputer
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