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4.1. Data transmission format
Note: The term “trip status” used in this manual includes retry waiting status and trip retention status.
4.1.1. Data transmission format used in ASCII mode
A communication number is used to specify a data item, all data is written in hexadecimal, and JIS-
Computer → Inverter
Omissible in | For the W and P commands only | Omissible |
(3.5bytes
Blank)
"("
(28H)
| CMD |
2 bytes | 1 byte |
Communication No.
4 bytes
DATA
0 to 4 bytes
"&"
(26H)
SUM
2 bytes
")"
(29H)
CR
(0DH)
(3.5bytes
Blank)
Checksum area
Omissible
1. “(“ (1 byte) | : Start code in ASCII mode |
2.
The command is executed only when the inverter number matches up with that specified using a parameter.
(When * is specified in broadcast communication, the inverter number is assumed to match if all numbers except * match. When * is specified instead of each digit
If the inverter number does not match or if the inverter number is of one digit, the data will be judged invalid and no data will be returned.
3. CMD (1 byte) | : Command (For details, see the table below.) |
4.Communication No.(4 bytes)
:Communication number (See 11, “Parameter data.”)
5.Data (0 to 4 bytes): Write data (valid for the W and P commands only)
6. | “&” (1 byte) | : Checksum discrimination code (omissible. When omitting this code, you also need to omit |
|
| the checksum.) |
7. | Sum (2 bytes) | : Checksum (omissible) |
|
| Add the |
|
| (ASCII codes) from the start code to the checksum discrimination code. |
|
| Ex.: (R0000&??) CR |
|
| 28H+52H+30H+30H+30H+30H+26H=160H |
|
| The last two digits represent the checksum. = 60 |
|
| When omitting the checksum, you also need to omit the checksum discrimination |
|
| code. |
8. | “)” (1 byte) | : Stop code (omissible) |
9. | CR (1 byte) | : Carriage return code |
Details of commands and data
CMD (1 byte) | Write data (0 to 4 bytes) Hexadecimal number |
R (52H): RAM read command | No data |
W (57H): RAM/EEPROM write command | Write data (0 to FFFF) |
P (50H) RAM write command | Write data (0 to FFFF) |
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