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18 Modbus RTU MN744
Text Handling Continued
Read List Parameter Text
(Sub-Code 4)
This PDU is used to read fault code text.
Request PDU
Byte 1
Byte 2 Byte 3 Byte 4
Function Code (66) Sub-Code (4) Fault Code H Fault Code L
Where,
Byte 1: Text Handing Function Code 66 (0x42)
Byte 2: Read Fault Code Text Sub-Code
Byte 3-4: 16-Bit Fault Code Number
Response PDU:
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 . . . Byte N-1 Byte N
Function Code (66) Sub-Code (4) Fault Code H Fault Code L ASCII . . . ASCII NULL
Where,
Byte 5 - N: Fault Code Text
Null Terminated ASCII String of up to 16 characters
Language Determined by Drive Parameter
Read Software Version Text (Sub-Code 5)
This PDU is used to read the software version number.
Request PDU
Byte 1
Byte 2
Function Code (66) Sub-Code (5)
Where,
Byte 1: Text Handing Function Code 66 (0x42)
Byte 2: Read Software Version Number Sub-Code
Response PDU:
Byte 1
Byte 2 Byte 3 . . . Byte N-1 Byte N
Function Code (66) Sub-Code (5) ASCII . . . ASCII NULL
Where,
Byte 3 - N: Software Version Number
Null Terminated ASCII String of up to 16 characters
Language Determined by Drive Parameter
Read Parameter Level Text (Sub-Code 6)
This PDU is used to read parameter division names from the control card.
Request PDU
Byte 1
Byte 2 Byte 3 Byte 4
Function Code (66) Sub-Code (6) Parameter Number
Where,
Byte 1: Text Handing Function Code 66 (0x42)
Byte 2: Read Parameter Division Name Sub-Code
Byte 3-4: 16-Bit Parameter Number (PN)
16-bit signed integer
High to low data byte order
Response PDU:
Byte 1
Byte 2 Byte 3 Byte 4 Byte 5 . . . Byte N-1 Byte N
Function Code (66) Sub-Code (6) Fault Code H Fault Code L ASCII . . . ASCII NULL
Where,
Byte 5 - N: Parameter Division Name
For example, LEVEL 1 or LEVEL 2
Null Terminated ASCII String of up to 16 characters
Language Determined by Drive Parameter