Mitsubishi Electric 800 Series, Инструкция по эксплуатации, Страница: 559 / 727

(N) Operation via communication and its settings
558
PARAMETERS
 Data definitions
• Control code
• Inverter station number
Specify the station number of the inverter which communicates with the computer.
• Instruction code
Specify the processing request, for example, operation or monitoring, given by the computer to the inverter. Hence, the
inverter can be run and monitored in various ways by specifying the instruction code appropriately. (Refer to
page 564 .)
• 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
page 564 .)
• 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 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.)

Number set in data × 10 (ms) when Pr.123 = "9999". Pr.123 setting (ms) when Pr.123 ≠ "9999".

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 559 .)
• Sum check code
The sum check code is a 2-digit ASCII (hexadecimal) representing the lower 1 byte (8 bits) of the sum (binary) derived from
the checked ASCII data.
Signal name ASCII Code Description
STX H02 Start Of Text (Start of data)
ETX H03 End Of Text (End of data)
ENQ H05 Enquiry (Communication request)
ACK H06 Acknowledge (No data error detected)
LF H0A Line Feed
CR H0D Carriage Return
NAK H15 Negative Acknowledge (Data error detected)
Computer
Inverter
Inverter
Computer
Inverter data processing time
= +
Waiting time data check time
∗
2
∗
1
(Example 1)
Computer Inverter
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 or Pr.337 (Waiting time setting) "9999", create the communication request
data without "waiting time" in the data format. (The number of characters decreases by 1.)
Inverter
ASCII Code
ASCII Code
Binary code
H30+H31+H31+H37+H37+H30
= H130
Sum
check
code
Sum
check
code
Computer