Modbus Instruction manual 7705/08
05/08
Modbus Instruction manual 77
Note: If Ramp set-point 434 = 2 (only reference line value), this reference line
value is limited to fmin. Please consider that the sign in front of fmin at
reference value = 0 is derived from the sign in front of the last reference
line value ≠ 0.
After Power On, the reference line value is limited to +fmin!
For Ramp set-point 434 = 3, the sign in front of the overall reference
value results from the sum of internal reference frequency value
and reference line value.
The reference values can be read out on the frequency inverter with the help of the
KP500 control unit or VPlus operating software.
Actual values
Parameter Contents Format
Internal reference fre-
quency
228
Internal reference value from frequency ref-
erence value channel
xxx.xx Hz
Reference bus frequency
282
Reference line value. xxx.xx Hz
Reference ramp fre-
quency
283
Sum of internal + reference line value xxx.xx Hz
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