Siemens SINAMICS V90 Operating Instructions Manual page 213

Modbus register Description
number
40886/40887 IPos reference point
coordinate value
40900 Fixed speed setpoint 1
40901 Fixed speed setpoint 2
40902 Fixed speed setpoint 3
40903 Fixed speed setpoint 4
40904 Fixed speed setpoint 5
40905 Fixed speed setpoint 6
40906 Fixed speed setpoint 7
40934 MDI acceleration over-
ride
40935 MDI deceleration over-
ride
40950 Fixed torque setpoint
40960/40961 Number of pulses per
revolution
40962/40963 Numerator of electronic
gear 0
40964/40965 Numerator of electronic
gear 1
40966/40967 Numerator of electronic
gear 2
40968/40969 Numerator of electronic
gear 3
40970/40971 Denominator of the
electronic gear
Parameter scaling
Due to the limits of the integer data in the Modbus protocol, it is necessary to convert the
drive parameters before transmitting them. This is done by scaling, so that a parameter,
which has a position after decimal point, is multiplied by a factor, to get rid of the fractional
part. The scaling factor is as defined in the above table.
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 09/2016, A5E36037884-002
Modbus Unit Scaling factor
access
R/W LU 1
R/W - 0x4000 hex =
100% × motor
rated speed
R/W - 0x4000 hex =
100% × motor
rated speed
R/W - 0x4000 hex =
100% × motor
rated speed
R/W - 0x4000 hex =
100% × motor
rated speed
R/W - 0x4000 hex =
100% × motor
rated speed
R/W - 0x4000 hex =
100% × motor
rated speed
R/W - 0x4000 hex =
100% × motor
rated speed
R/W % 100
R/W % 100
R/W % 100
R/W - 1
R/W - 1
R/W - 1
R/W - 1
R/W - 1
R/W - 1
Control functions
7.7 Communicating with the PLC
Range or Data/parameter
On/Off text
-2147482648 to p2599
2147482647
-210000.000 to p1001
210000.00
-210000.000 to p1002
210000.00
-210000.000 to p1003
210000.00
-210000.000 to p1004
210000.00
-210000.000 to p1005
210000.00
-210000.000 to p1006
210000.00
-210000.000 to p1007
210000.00
0.1 to 100 p2692
0.1 to 100 p2693
-100 to 100 p29043
0 to 16777215 p29011
1 to 10000 p29012[0]
1 to 10000 p29012[1]
1 to 10000 p29012[2]
1 to 10000 p29012[3]
1 to 10000 p29013
213