92 Program featuresIn the ACS880, the following settings are made:• 92.01 Encoder 1 type = HTL• 92.02 Encoder 1 source = Module 1• 92.10 Pulses/revolution = 2048• 92.13 Position estimation enable = Enable• 90.51 Load feedback selection = Encoder 1• 90.63 Feed constant numerator = 8192 (ie. 4 × value of 92.10, as the receivednumber of pulses is 4 times nominal. See also parameter 92.12 Resolverpolepairs)• The desired “data out” parameter is set to Other – 90.58 Pos counter init valueint (32-bit format). Only the high word needs to be specified – the subsequentdata word is reserved for the low word automatically.• The desired sources (such as digital inputs or user bits of the control word) areselected in 90.67 Pos counter init cmd source and 90.69 Reset pos counterinit ready.In the PLC, if the initial value is set in 32-bit format using low and high words(corresponding to ACS800 parameters POS COUNT INIT LO and POS COUNT INITHI), enter the value 66770 into these words as follows:Eg. PROFIBUS:• FBA data out x = POS COUNT INIT HI = 1 (as bit 16 equals 66536)• FBA data out (x + 1) = POS COUNT INIT LO = 1234.ABB Automation using DDCS communication, eg.:• Data set 12.1 = POS COUNT INIT HI• Data set 12.2 = POS COUNT INIT LOTo test the configuration of the PLC, initialize the position counter with the encoderconnected. The initial value sent from the PLC should immediately be reflected by90.07 Load position scaled int in the drive. The same value should then appear in thePLC after having been read from the drive.SettingsParameter groups 90 Feedback selection (page 451), 91 Encoder module settings(page 460), 92 Encoder 1 configuration (page 463) and 93 Encoder 2 configuration(page 470). JoggingThe jogging function enables the use of a momentary switch to briefly rotate themotor. The jogging function is typically used during servicing or commissioning tocontrol the machinery locally.Two jogging functions (1 and 2) are available, each with their own activation sourcesand references. The signal sources are selected by parameters 20.26 Jogging 1 startsource and 20.27 Jogging 2 start source. When jogging is activated, the drive startsand accelerates to the defined jogging speed (22.42 Jogging 1 ref or 22.43 Jogging 2
