User manual

Modbus RTU 21MN744
Parameter Support (H2 Function Code 67)
These sub-functions provide special parameter support functions.
Parameter Count (Sub-Code 1)
This PDU is used to the number of control card parameters supported.
Request PDU
Byte 1
Byte 2
Function Code (67) Sub-Code (1)
Where,
Byte 1: Parameter Support function code 67 (0x43)
Byte 2: Parameter Count Sub-Code 1
Response PDU:
Byte 1
Byte 2 Byte 3 Byte 4
Function Code (67) Sub-Code (1) Count H Count L
Where,
Byte 3-4: 16-bit parameter count
Parameter Configuration (Sub-Code 2)
This PDU is used to extract parameter data from the control card. Once the number of parameters supported on
the card is known the master should enter into a loop and read parameter configuration data for each parameter
using the following PDU.
Request PDU
Byte 1
Byte 2 Byte 3 Byte 4
Function Code (67) Sub-Code (2) Index H Index L
Where,
Byte 1: Control Card Parameter Configuration Function Code 67 (0x42)
Byte 2: Parameter Configuration sub-code 2
Byte 2-3: Parameter Index (1≤x<Parameter Count)
Response PDU:
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 . . . Byte 22 Byte 23
Function Code (67) Sub-Code (2) Index H Index L PN H PN L ASCII 1 . . . ASCII 16 Class
Byte 24 Byte 25 Byte 26 Byte 27 Byte 28 Byte 29 Byte 30 Byte 31 Byte 32 Byte 33 Byte 34 Byte 35
ATTR H ATTR L Units Data Type SF HH SF HL SF LH SF LL Value HH Value HL Value LH Value LL
Byte 36 Byte 37 Byte 38 Byte 39 Byte 40 Byte 41 Byte 42 Byte 43 Byte 44 Byte 45 Byte 46 Byte 47
Max HH Max HL Max LH Max LL Def HH Def HL Def LH Def LL Min HH Min HL Min LH Min LL
Where,
Byte 1: Control Card Parameter Configuration Code 67 (0x43)
Byte 2: Parameter configuration sub-code 2
Byte 3-4: Parameter Index
Byte 5-6: Parameter Number (DD10025 spec)
Byte 7-22: Parameter Name (16 ASCII text characters, left justified and blank filled)
Byte 23: Class
Bit0 - set for Inverter (I)
Bit1 - set for Vector (V)
Bit2 - set for Servo (S)
Byte 24-25: Parameter Attributes (ATTR)
Bit0 - Read (R)
Bit1 - Write (W)
Bit2 - changeable while drive is enabled (DE)
Bit3 - saved to EE
Bit4 - Parameter Hidden
Bit5 - Drive Parameter
Bit6 - Changeable List Parameter
Bit7 - 9 reserved
Bit10 - parameter is speed units dependent
Bit11 - parameter has monitor status
Bit12 - parameter has o-scope support
Bit13 - parameter has fault trace attribute
Bit14 - parameter viewable by Workbench