Mitsubishi Electric FR-E540 Instruction Manual download pdf (Page 127)

PARAMETERS

114

7) 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.

10 1E1 07ADF4

H05 H30 H31 H31H45 H31 H30 H37 H41 H44 H46 H34

(Example1)

Computer

→

Inverter

ASCII code

→

Station

number

Instruction

code

*Waiting

time

Data

Sum check

code

←

Binary code

Sum

↓

30 + 31 + 45 + 31 + 31 + 30 + 37 + 41 + 44

=1F4

HH HHHHHHH

0 117030

H02 H30 H31 H37H31 H37 H30 H03 H33 H30

(Example2)

Inverter

→

Computer

ASCII code

→

←

Binary code

Sum check

code

STX

Station

number

Read data

ETX

Sum

↓

30 + 31 + 31 + 37 + 37 + 30

=130

HHHHHH

ENQ

*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.)

8) 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. (Refer to page 118)

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:

Instruction

Code

Data

Read H7F

Link parameter

expansion setting

Write HFF

H00: Pr. 0 to Pr. 79 values are accessible.

H01: Pr. 100 to Pr. 158 and Pr. 900 to Pr. 905 values are

accessible.

H02: Pr. 160 to Pr. 244 values are accessible.

H03: Pr. 300 to Pr. 348 values are accessible.

H05: Pr. 500 to Pr. 516 values are accessible.

(NA, EC versions only)

H09: Pr. 990 and Pr.991 values are accessible.

1 2 ... 122 123 124 125 126 127 128 129 130 131 132 ... 216 217

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Mitsubishi Electric FR-E540 Instruction Manual Page 127

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