Mitsubishi Electric FR-CC2-N Series, Инструкция по эксплуатации

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112
5. PARAMETERS
5.7 (N) Communication operation parameters
Specify the delay time (time period between the time when the converter unit receives data from the computer and the time
when the converter unit starts transmission of reply data). Set the time delay in accordance with the response time of the
computer in the range of 0 to 150 ms in 10 ms increments. (For example; 1 = 10 ms, 2 = 20 ms)
When Pr.123 PU communication waiting time setting or Pr.337 RS-485 communication waiting time setting is set
to other than "9999", create the communication request data without "delay time" in the data format. (The number of
characters decreases by 1.)
*1 When Pr.123 = "9999", the waiting time is the data setting value × 10 ms. When Pr.123 ≠ "9999", the waiting time is the value set in Pr.123 .
*2 The time is about 10 to 30 ms. It varies depending on the instruction code.
NOTE
• The data check time varies depending on the instruction code. (Refer to page 113 .)
• Sum check code
The sum check code is a 2-digit ASCII (hexadecimal) representing the lower 1 byte (8 bits) of the sum derived from the
checked ASCII data.
• Error code
If any error is found in the data received by the converter unit, its error definition is sent back to the computer together with
the NAK code.
Computer
Converter unit
Converter unit
Computer
Converter unit data processing time
= Waiting time
∗1
+ Data check time
∗2
(Example 1)
Computer Converter unit
ENQ
*W
aiting
time
1
Instruction
code
Station
number
0 1
Data
E 1 0 7 A D F 4
H05 H30 H31 H31 H45 H31 H30 H37 H41 H44 H46 H34
Binary code
H30+H31+H45+H31+H31+H30+H37+H41+H44
= H1F4
Sum
(Example 2)
STX
Data read
Station
number
0 1 1 7 0 3 0
H02 H30 H31 H37 H31 H37 H30 H03 H33 H30
Sum
ETX
7
∗
When the Pr. 123 Waiting time setting "9999", create the communication request
data without "waiting time" in the data format. (The number of characters decreases by 1.)
Converter unit
ASCII Code
ASCII Code
Binary code
H30+H31+H31+H37+H37+H30
= H130
Sum
check
code
Sum
check
code
Computer
Error code Error item Error description Converter unit operation
H0 Computer NAK error
The number of errors consecutively detected in
communication request data from the computer is greater
than the permissible number of retries.
The inverter output is shut off
(E.PUE/E.SER) if error occurs
continuously more than the
permissible number of retries.
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 unit.
H3 Protocol error
The data received by the converter unit 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
unit completes receiving the preceding data.
H6 — — —