Delta MH300 Series - Page 1021

Appendix A. Modbus Protocol
MS300
A-10
Function Name
Modbus
Address
Attribute
(Function
Code)
Size Description
U16
bit11–8
0010B: 2nd step speed
0011B: 3rd step speed
0100B: 4th step speed
0101B: 5th step speed
0110B: 6th step speed
0111B: 7th step speed
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 2001H
R (03H) /
W (06H,
10H)
Frequency command (XXX.XX Hz).
There are two decimal places for general-purpose drives.
Fault / control
command source
2002H
R (03H) /
W (06H,
10H)
bit0
1: External Fault (E.F.)
ON
To trigger an external fault
to the drive to make it stop
running. Drive’s stop
method can be set through
drive parameters.
bit1 1: Reset To clear the fault status
bit2 1: Base block (B.B) ON
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.
bit5 1: Fire mode ON
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.
bit15–3 Reserved