Mitsubishi Electric FR-CC2-P, Инструкция по эксплуатации

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(N) Operation via communication and its settings
122
PARAMETER
 Data definitions
• Control code
• Converter unit station No.
Specify the station number of the converter unit which communicates with the computer.
• Instruction code
Specify the processing request, for example, monitoring, given by the computer to the converter unit. Therefore, the
converter unit can be run and monitored in various ways by specifying the instruction code appropriately. (Refer
page 128 .)
• Data
Indicates the data such as frequency and parameters transferred to and from the converter unit. The definitions and ranges
of set data are determined in accordance with the instruction codes. (Refer
page 128 .)
• Waiting time
Specify the waiting time between the receipt of data at the converter unit 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. (Example; 1: 10 ms, 2: 20 ms)
When a value other than "9999" is set in
Pr.123 PU communication waiting time setting , the Pr.123 setting is effective
as the delay time.
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 page 123 .)
• 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.
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
Converter unit
Converter unit
Computer
Converter unit data processing time
= Delay time *1 + Data check time *2