Mitsubishi Electric FR-A520-0.4K -55K Instruction Manual page 131

5) Waiting time
Specify the waiting time between the receipt of data at the inverter form the computer and the transmission
of reply data. Set the waiting time in accordance with the response time of the computer between 0 and
150ms in 10ms increments (e.g. 1 = 10ms, 2 = 20ms).
Computer
↓
Inverter
Inverter
↓
Computer
6) Sum check code
The sum check code is 2-digit ASCII (hexadecimal) representing the lower 1 byte (8 bits) of the sum
(binary) derived from the checked ASCII data.
(Example1)
Computer→Inverter
ASCII code→
*When Pr. 123 "waiting time setting" ≠‚ 9999, create the communication request data with no "waiting time" in the data format.
(The number of characters is decreased by 1.)
(Example2)
Inverter→Computer
ASCII code→
7) Error code
If any error is found in the data received by the inverter, its definition is sent back to the computer together
with the NAK code.
Note: 1. When the data from the computer has an error, the inverter will not accept that data.
2. Any data communication, e.g. run command, monitoring, is started when the computer
gives a communication request. Without the computer's command, the inverter does not
return any data. For monitoring, therefore, design the program to cause the computer to
provide a data read request as required.
3. Data for link parameter expansion setting differs as indicated below between access to
Pr. 0 to Pr. 99 values and access to Pr. 100 to Pr. 905:
Link parameter
expansion setting
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Station
Instruction
ENQ
number
code
0 1 E 1 0
1
H05 H30 H31 H45 H31 H31 H30 H37 H41 H44 H46 H34
↓
H H H H H H H H
30 + 31 + 45 + 31 + 31 + 30 + 37 + 41 + 44
H
=1F4
Sum
Station
STX Read data ETX
number
0 1 1 7 7 0
H02 H30 H31 H31 H37 H37 H30 H03 H33 H30
↓
H H H H H H
30 + 31 + 31 + 37 + 37 + 30
H
=130
Sum
Instruction
Code
Read H7F H00: Pr. 0 to Pr. 99 values are accessible.
H00: Pr. 0 to Pr. 99 values are accessible.
H01: Pr. 100 to Pr. 159, Pr. 200 to Pr. 231 and Pr. 900 to
Pr. 905 values are accessible.
Write HFF H02: Pr. 160 to Pr. 199 and Pr. 232 to Pr. 285 values are
accessible.
H03: Pr. 300 to Pr. 399 values are accessible.
H09: Pr. 990 value is accessible.
118
PARAMETERS
Inverter data processing time
=waiting time + data check time
(set value×10ms) (12ms)
Sum check
Data
code
7 A D F 4
←Binary code
H
Sum check
code
3 0
←Binary code
Data