Delta MS300 Series User Manual page 798

Modbus
Function Name
Address
Frequency command
Fault / control
command source
Attribute
(Function Size
Code)
R (03H) /
2001H W (06H,
U16
10H)
R (03H) /
2002H W (06H,
10H)
Appendix A. Modbus ProtocolMS300
0000B: zero step speed
0001B: 1st step speed
0010B: 2nd step speed
0011B: 3rd step speed
0100B: 4th step speed
0101B: 5th step speed
0110B: 6th step speed
0111B: 7th step speed
bit11–8
1000B: 8th step speed
1001B: 9th step speed
1010B: 10th step speed
1011B: 11th step speed
1100B: 12th step speed
1101B: 13th step speed
1110B: 14th step speed
1111B: 15th step speed
bit12 1: Enable bit06–11 function
bit15 Reserved
Frequency command (XXX.XX Hz). There are two decimal
places for general-purpose drives.
1: External Fault (E.F.)
bit0
ON
bit1 1: Reset
bit2 1: Base block (B.B) ON
bit5 1: Fire mode ON
bit15–3 Reserved
789
Description
reading 2107h.
To trigger an external fault
to the drive to make it stop
running. Drive's stop
method can be set through
drive parameters.
To clear the fault status
To trigger an external base
block to the drive to
suspend the operation.
When bit = 0 and clear BB
situation, the drive returns
to the previous operation.
To prevent the drive from
shutting down due to its
own protection, and to
maintain the important fan
operation without
controlling by any control
signal or alarm.