Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 642

• Data
Indicates the data such as frequency and parameters transferred to and from the inverter. The definitions and ranges of
set data are determined in accordance with the instruction codes. (Refer to
• Waiting time
Specify the waiting time between the receipt of data at the inverter from the computer and the transmission of reply data.
Set the waiting time 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 or Pr.337 (waiting time setting) ≠ "9999", create a communication request data without waiting time in the
data format. (The number of characters decreases by 1.)
Computer
Inverter
Inverter
Computer
*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
• 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.
(Example 1)
Computer Inverter
ASCII Code
* When the Pr.123 or Pr.337 (Waiting time setting)
data without "waiting time" in the data format. (The number of characters decreases by 1.)
(Example 2)
Inverter
Computer
ASCII Code
• Error code
If any error is found in the data received by the inverter, its error definition is sent back to the computer together with the
Instruction
ENQ Station
code
number
0 1 E 1 1
H05 H30 H31 H45 H31 H31 H30 H37 H41 H44 H46 H34
H30+H31+H45+H31+H31+H30+H37+H41+H44
= H1F4
Sum
"9999", create the communication request
Data read
Station
STX
number
0 1 1 7 7
H02 H30 H31 H31 H37 H37 H30 H03 H33 H30
H30+H31+H31+H37+H37+H30
= H130
Sum
page 646.)
Inverter data processing time
Waiting time*1
=
page 642.)
Sum
check
Data
code
0 7 A D F 4
Binary code
Sum
ETX
check
code
0 3 0 Binary code
5.15 (N) Communication operation parameters
data check time*2
+
5. PARAMETERS
1
2
3
4
5
6
7
8
9
10
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