NORD Drivesystems BU0050 - Manual (Page 48)

NORD USS and Modbus RTU Manual
48 Subject to technical amendments BU 0050 GB-3111
1.6.5 Reading the acceleration time parameter
The acceleration time parameter (USS No. = 102
dec
/ 66
hex
) in parameter set 2 of a frequency inverter with the
USS address 3, is to be read out. No process data is transferred.
Procedure:

Set address (Address 03)

Generate parameter label (PKE 10 66)

Select parameter set 2 (IND = 01)

Send telegram

Check response telegram (PWE = 3E8)
Details:
0 1 2 3 4 5 6 7 8 9 10 11 12 13
STX LGE ADR PKE PKE IND IND PWE PWE STW STW SW1 SW1 BCC
02 0C 03 10 66 00 01 00 00 00 00 00 00 7A
The response telegram of the slave contains the required parameter value in internal standardisation and
could be as follows:
0 1 2 3 4 5 6 7 8 9 10 11 12 13
STX LGE ADR PKE PKE IND IND PWE PWE ZSW ZSW IW1 IW1 BCC
02 0C 03 10 66 00 01 03 E8 0B 31 20 00 A8
The value sent in PWE2 is C8
HEX
corresponding to 1000
DEC
, with a resolution of 0.01 seconds, this
corresponds to an acceleration time of 1000 * 0.01 = 10 seconds
 10 / 0.01 = 1000 (3E8
hex
)