KEB COMBIVERT F5-A, Applications Manual, Page: 371 / 552

To that end, the bus address of PS.34 (=1322h or 4898) or of PS.24 (= 1318h or 4888) must be entered in Sy.24
"write data 1 definition" (dependent on setting of PS.33).
The second parameter is typically occupied with the control word Sy.50 to allow driving the inverter as com-
pletely as possible via the bus.
Parameter Sy.43 "control word (long)" cannot be utilised because only a 16 bit parameter may be used. Para-
meter oP.03 "reference setting" can be used as third parameter if change-over from contouring control mode to
speed-controlled operation shall be possible.
Sy.24 proc. write data 1 defin. = 1318h or = 1322h
Sy.26 proc. write data 2 defin. = 32h
Sy.28 write data 3 definition = 303h
In the parameters Sy.16, Sy.18 and Sy.20, the bus addresses of the parameters that are to be read bus-syn-
chronously from the customer control must be set.
Again, 3 parameters (one 32 bit parameter and two 16 bit parameters) can be selected.Which parameters are
to be read depends on the application. Typically, however, ru.54 "actual position" (32 bit parameter) and Sy.51
"status word (low)" (16 bit parameter) are always read.
Sy.16 read data 1 definition = 236h
Sy.18 read data 2 definition = 33h
7.12.5.4 Contouring control mode / speed precontrol
With activation of the countouring module, the current position value (ru.54) must be read once and then be
transmitted three times as the setpoint. This is necessary to initialise the drive-internal speed pilot control.
In the same manner the same setpoint must also be transmitted three times to stop the drive, e.g., before en-
ding the bus-synchronous operation. This sets the speed pilot control to zero.
When setting the position setpoints, one must ensure that the drive will be able to follow them with the maxi-
mum permissible speed. Only oP.14 "absolute maximum reference for" and oP.15 "absolute maximum refe-
rence rev" function as speed limits.
7.12.5.5 Contouring control mode / watchdog
A breakdown of the bus system is particularly critical during bus-synchronous operation. Therefore, bus moni-
toring should always be activated. To that end, a value unequal to 6 must be programmed in parameter Pn.05
"watchdog response" .
In Sy.09 "HSP5 watchdog time", the monitoring time for the HSP5 connection between inverter and operator
can be adjusted. Value "0:off" means that the watchdog is not active. The monitoring time of the fieldbus con-
nection is parametrized in Pn.06 "watchdog time". The actual monitoring of the fieldbus is carried out by the
operator. With the parameter Pn.05 "watchdog response", one selects how the drive responds (e.g., immediate
error message or quick stop) to the occurence of a bus breakdown (HSP5 or fieldbus).
From software 4.3 the contouring control was reveised as follows with PS.61 and Sy.76:
The interpolated pre-profile is temporal optimal calculated to the adjustment of the cycle time and the smoothing
time of the speed measurement.
For this PS.61 must be activated. The half value of Ec.03 should be adjusted in cS.30.
Synchronization to the time pattern of the master of the contouring control is internally done no longer hard by
compensation of the error up to the next ms interrupt, but via adjustable low pass filter with Sy.76.
The initialization is improved. The contouring mode can be activated at any time. Not several cycles must be
await before release.
If PS.61 is set to 1: on, the precontrol profile in the contouring mode is corrected with a PT1 element. This func-
tion is only active in the contouring mode. The adjustment occurs automatically by the value written in Sy.08.
Posi- and synchronous operating
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