User manual

Modbus RTU 19MN744
Text Handling Continued
Read Parameter Block Text
(Sub-Code 7)
This PDU is used to reads a parameter's block name from the control card.
Request PDU
Byte 1
Byte 2 Byte 3 Byte 4
Function Code (66) Sub-Code (7) 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 (7) Parameter Number ASCII . . . ASCII NULL
Where,
Byte 5 - N: Parameter Group Name
For example, PRESET SPEEDS or PROCESS CONTROL
Null Terminated ASCII String of up to 16 characters
Language Determined by Drive Parameter
Read Fault Log Text (Sub-Code 8)
This PDU is used to read fault log entries from the control card.
Request PDU
Byte 1
Byte 2 Byte 3 Byte 4
Function Code (66) Sub-Code (8) Group No. Requested Entry
Where,
Byte 1: Text Handing Function Code 66 (0x42)
Byte 2: Read Fault Log Entry Sub-Code
Byte 3: Group Number
0 - Control card fault log
1 - Powerbase fault log
Byte 4: Requested Fault Log entry number (1-M)
Host should start 1
Can be read in any sequence
Modbus exception upon request of invalid entry number
Maximum number of entries, M, returned in response
Response PDU:
Byte 1
Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8 Byte 9 Byte 10 Byte 11
Function Code (66) Sub-Code (8) Group No. Requested Entry Max Entries M M / D D /
Byte 12 Byte 13 Byte 14 Byte 15 Byte 16 Byte 17 Byte 18 Byte 19 Byte 20 Byte 21 Byte 22 Byte 23 Byte 24 Byte 25
Y Y Y Y Space H H : M M : S S Space
Byte 26 Byte 27 . . . Byte N
ASCII ASCII . . . NULL
Where,
Byte 5: Maximum number of fault log entries
Bytes 6-15: ASCII month/day/year
Byte 16: ASCII space
Bytes 17-24: ASCII hour: minute: second
Byte 25: ASCII space
Bytes 26-N: ASCII fault code text of up to 16 characters